This are the steps I took on my 1995 GMC Sierra whose base idle was consistently running 1200+ rpm (too high). 1) warm to operating temp; 2) engine off, jump A-B; 3) key on, engine off; 4) 30 secs for IAC to close; 5) unplug IAC; 6) remove jumper; 7) engine on with idle racing about 1800 rpm; 8) adjust idle screw with 20 torx--counterclockwise one half turn--note: engine does not respond at this step; 9) engine off, plug in IAC; 10) test engine on: idle=750-800; 11) engine off and unplug battery 30+ secs to reset any codes. On restart, engine maintained 800ish rpm at idle warm. Note that my setup includes a rebuilt TBI by SPR Performance with double bushings at the throttle butterfly valve to prevent fuel seepage caused by pressure from the ATI Procharger. I hope these notes answer the question as to how much of a twist of the adjustment screw is needed and what to expect when turning it.
@3rdGenC10s
Жыл бұрын
Nice
@chucklaneChuckylane
Ай бұрын
I finally figured out that the plug for the TPS was bad, cut it back a few inches & wa-la! Idles at 600 now & runs perfect..only took me 7 years to figure that out, if all the contacts are good the plug itself don't necessarily have to be good automatically. DOH! 😂
@AustinMiilbarge
6 күн бұрын
The thing is you guys finally fixed the problem thanks for your dedication to solving the problem for all of us..May God bless you 🙏
@Onbloods1325 күн бұрын
Thanks my dude your a real one for sure, I’m gonna adjust my tbi later on my 91 s10. The problem I’m having is during acceleration my truck kinda bogs down, 1st,2nd gear kinda bogs 3rd gears seems like it kicks then the 4.3 is happy again, then stop light comes up, and oil pressure tach goes down, and so does the gas gauge, sometimes the truck will turn off if I don’t have my foot on gas a little.
@3rdGenC10s
14 күн бұрын
Glad I could help!
@sergiomalacara35824 жыл бұрын
Gracias amigo, si funciono en mi chevy 350 1990 saludos desde monterrey n.l. mexico
@3rdGenC10s
4 жыл бұрын
Sergio Malacara Genial, ¡me alegro de que el video te haya podido ayudar! ¡Agradezco el apoyo!
@chucklaneChuckylane5 ай бұрын
Finally I learned something about the TBI that I didn't have to second guess whatever issue I was having at the time! I've had a 1994 GMC Sonoma for going on 8 years now, I love the truck, rwd, 4.3, automatic, ex cab, that was crashed a little bit so I put a frame horn on & went from there. I drive a little aggressive but in Reno if you don't, you'll get sucked right in to the non stop circus of the lamest people trying to drive without a clue what they're doing! Traffic tripled here in a less than two years, being a local, I know every back alley & side street there is so I mash the pedal & jam! I'm a former m/ racer so it's not like I'm just going fast like the rest of em', I pay attention to my every move in advance & don't look at my phone ever! But it's been a lot harder to do when I find that I can't rely on a strong little v6 to get with the program when a car is heading my way & I can't afford a stall or sputer that I have to feather the throttle with in order to not slammed. I've got an older 4.3 not a vortex anymore, but this is a strong engine, I also freshened it up with crane roller rockers, new push rods, oil pump, timing set up, all new sensors, which ain't much for a 94 on the cusp of KISS to more complicated than it's worth with all of the OBD 2 garbage, my buddy completely rebuilt my transmission with Corvette servos, after going thru transmission blues between getting ripped off for one tranny, a piss poor mechanic who supposedly knew tranny's, bla, bla, & four transmissions later, I have a Vette trans or a Camaro one, both the same, but built right with not a leak anyplace. He helped me install the new old 4.3 & it's truly a great truck with plenty of power when I want it, all of this was done and it was a happy place..until the very first cold night every year, then it would start tripping out & revving like the throttle was stuck, about 2500 for a few minutes then slowly start to drop off & then it'd go down to about 1200 for a minute or so, then it'd drop to 800 after the whole thing played out over a ten minute time span that seemed like 30 minutes half the time, not to mention fuel at 4.00+ for ever, or until it scrapes the paint off of a 5 dollar bill every few months. But then it would run great, no problem all day until the next morning, then the same shit all over again until spring came along, then it'd light right up, no high idle, no waiting to leave, ran perfect, until winter again, wash, rinse, repeat, every year with not one person on being able to tell me something I had not already tried to no avail. I had new TPS, new IAC, new temp sensors, new MAP sensor, new Mass air flow, new vacuum lines, all of the wiring is on the firewall, like an old school ride, not being bbq' on top of the engine like factory, I did that right away, but with literally every sensor new at the exact same time when I put the other engine in, it started doing all of the high revving stuff again, it made no sense to anyone, yes, I even put a new computer in & it was a BDYT exactly as the one it had new, I now have a complete set i can change out in a few minutes whenever I thought maybe its something else? I just went thru this two weeks ago, & rather than buy a brand new IAC, I opted for just a new TPS because it was on warranty so maybe it was bad now, it's been three years almost since the new engine, tranny so what the heck, I've asked more people than you could round up for free green beer on St. Patrick's Day & still no logical answers & figured it was just what it's gonna be. The fuel injectors were going me some problems and out of the blue, the idle started acting up but different than the other ones, then it died completely, between scrounging up a set of injectors that would do until I had money, I thought that maybe the TPS again, I didn't know, but this time, all of the sudden, it idled right down, right away and it was freezing outside! So now it ain't screaming bloody murder every morning, but all of the sudden, it was idling a bit too low, & dying on me over the past few days, I tried timing adjustment, nothing would bring it up just a few hundred rpm & I've been raçking my brain trying to to figure out what to do next. I needed to replace the cruise control cable for a long time now & just hadn't gotten around to it until now, that's when I needed to figure how to move the little clip thingy without breaking it, that is what brought me to your video, & you having the answer I probably needed when it was idling high, most likely not, but the point is now it doesn't idle high for whatever it was that I replaced this time that didn't work when I replaced it the previous times, but the high idle is gone, the low idle problem is over now, thanks only to you, because up until this point I was flipping out over finding out my motorcycle insurance just leaped way up because of one speeding ticket I got in my truck last fall, and never had a violation period on my motorcycle in more than 36 years, but now my fucking insurance automatically raised it because maybe I'm gonna go wild in the streets like Marlon Brando because I got a ticket in my truck, but need two classes of license and never had a ticket on a hot rod motorcycle, so I'm automatically guilty when my truck & my bike don't have anything in common period, I guess if I step on a bug outside, and kill it, I'm going to start being a serial killer by next week! Fucking burocratic bullshit, I want to sue em' but I'm white,so that won't work, but you sir,made my fucking day & I thank you very much for the useful information that I needed today of all days, you rock! 🏁✌️
@3rdGenC10s
Ай бұрын
Hell yeah brother!
@chucklaneChuckylane
Ай бұрын
It was the plug for the TPS! Now it's dialed in & I didn't have to change the idle screw. Goes to show it don't have to look bad to be shit! Still loved your video, thanks✌️🏁
@CavanalK53 жыл бұрын
That tach threw me for a loop when it rolled up to the top. Quite functional though!
@3rdGenC10s
3 жыл бұрын
Yes sir didn’t want to drill any holes.
@edbeck892511 ай бұрын
I had a high idle problem on my 89 Blazer. I did the jumper wire to A & B, turned the key on for a minute, disconnected, the battery for awhile and it seems to be starting up and idling about right now
@3rdGenC10s
11 ай бұрын
Hope it helped you out.
@benjaminward52953 жыл бұрын
Just what i needed thanks for the video.
@3rdGenC10s
3 жыл бұрын
No problem, I appreciate the support
@SSRacing668 ай бұрын
Nice Vid. I have a Jeep with a GM 4.3L TBI, was working like a charm for 10 or so years, and all of a sudden it no longer wants to start in the morning. it fires a couple cylinders and then basically floods. If you hold it to the floor after, it Puffs and chugs until it clears out. Once warm, it runs nice and will start fine all day long, but the next morning same flooding issue. I can see all my sensors are working with WinALDL. Very strange. Any suggestions
@3rdGenC10s
8 ай бұрын
Maybe look into rebuilding the throttle body. Kits are cheap and simple, I would also check the injector flow as well. You can cycle the injectors with a 9v battery.
@user-ld1ru3hn1k Жыл бұрын
You never said when you are supposed to remove the jumper wire, is it before or after you start the truck?
@3rdGenC10s
Жыл бұрын
Steps are in the description.
@cjimijam
3 ай бұрын
Me too steps in the description arent the answer but will listen again thanks
@MrDirty-if7gc3 жыл бұрын
This worked great, fixed my problem, thank you so much.
@3rdGenC10s
3 жыл бұрын
Awesome! I appreciate the support!
@MadAtMax.300Blackout2 ай бұрын
I happen to have one of the code readers.. At what point in this do I unplug it? And should I have it set to emc or abs?
@3rdGenC10s
Ай бұрын
All the steps are in the description, I haven’t messed with a tbi in years so I can’t remember off the top of my head.
@michaeldavis84522 жыл бұрын
Bout to try this right now just swapped my blown 4.3 for a free 5.0 having the same issues already got a Ecu to match the motor just can’t get the idle right either have to adjust the throttle to 1200-1500 and it still doesn’t like it and I don’t have ac right now, maybe 🤔 this summer in this Texas Heat 🥵
@3rdGenC10s
2 жыл бұрын
Hope it helps.
@zoefaith1205 ай бұрын
I got a 92 s10 with the 2.8 v6. And it's over due for age maintenance.. I got gm code 44 and 46 if I watched the flashes rights. 44 lean and 46 faulty key cylinder. Years ago my father played with the 🐈. So south carolina don't check....cats... so it went away. How do I fix the lean for only having one of o2 sensor left. Yes I got a muffler single pipe.
@3rdGenC10s
Ай бұрын
I’m not real sure on that haven’t messed with a TBI in years.
@mountainwolf1 Жыл бұрын
@3rd Gen C10’s I have a 87 chevy silverado v10 5.7 tbi that has surging idle hard cold start and can not get rid of it I think this might do the trick any advice? Thanks godbless be well.
@3rdGenC10s
Жыл бұрын
Just follow the steps listed on the description of the video.
@rudyromero55211 ай бұрын
Esto lo gue estava buscando gracias 😊
@3rdGenC10s
11 ай бұрын
¡Me alegra que te haya ayudado!
@richardwurz51972 жыл бұрын
This helped but have a total different question when engine is cold has to have temperature sensor plugged in to get it started have to plug it out on engine is warm or we'll stall when stepping on the gas
@3rdGenC10s
2 жыл бұрын
I would verify fuel pressure before unplugging the CTS, sounds like the fuel pump could be going out.
@richardwurz5197
2 жыл бұрын
@@3rdGenC10s brand new fuel pump
@3rdGenC10s
2 жыл бұрын
@@richardwurz5197 I’d verify fuel pressure
@Arizona_rider2 жыл бұрын
If you do this u must adjust the tps. It’s adjustable too.
@3rdGenC10s
2 жыл бұрын
Good tip
@here_to_watch21154 ай бұрын
Does the iac stop making noise when its fully closed ?
@3rdGenC10s
3 ай бұрын
It should.
@extrememudmower291110 ай бұрын
I don't think you really need to or do you jump the OBD into the Iac I think you can just adjust it without having to do that I don't know though
@3rdGenC10s
10 ай бұрын
It’s my understanding you want the IAC closed when adjusting it from everything I’ve seen online
@dermharse96143 жыл бұрын
Oh this is gonna be fun on my 91 G20 van replaced the IAC now its too high
@3rdGenC10s
3 жыл бұрын
Yeah I bet on you’re van it’ll be fun
@dermharse9614
3 жыл бұрын
@@3rdGenC10s All good now wasnt so bad just used the torq-bit and small ratchet under the dog house got lucky no drilling the plug on the tbi, after changing the IAC it was idle at 2k now i got it down to where it barley enguages the torque averter, thanks for the video!
@3rdGenC10s
3 жыл бұрын
Yes sir, I appreciate the support!
@terryrobinson8827 Жыл бұрын
How did you install the RPM guage.y truck doesn't have one. And I'll need the gauge to set the idle
@3rdGenC10s
Жыл бұрын
Just followed the instructions. Tapped into the fuse panel and the coil.
@therealbenavis2 жыл бұрын
Putting out there to check the park neutral switch as it controls in gear rpm. It's dumb and not conventional but that's how they did it with tbi
@3rdGenC10s
2 жыл бұрын
Good tip
@dboles91932 жыл бұрын
Do you plug the IAC plug in before you adjust the idle or leave it unplugged until after?
@3rdGenC10s
2 жыл бұрын
Steps are listed in the description. It’s been so long since I did it I don’t remember the exact steps.
@dboles9193
2 жыл бұрын
@@3rdGenC10s I found the steps. I set my idle to 650 700 rpms and after I drove it they were back at 1000. I just got the truck and supposedly it's a 383 stroker. I found a hyper tech chip in the glove box for a 5.7 now wondering if maybe there's one on the emc for 383 that's overriding what I'm doing and bringing the idle back up
@dboles9193
2 жыл бұрын
@@3rdGenC10s what else could be the problem? Injectors are new. IAC is new. Everything is pretty much new. He finished it all at the end of 2020. I havent had anything that I've had to work on in a long time. Just trying refamiliariz myself with being a mechanic again.
@thedobermangang35033 жыл бұрын
i see with your truck running your oil pressure gauge is reading pass 60 at idle are your gauge working
Wasn't the idea of the factory plugged torx screw for it to "NEVER" be tampered with? That it is supposed to be exactly where it needs to be? And so with that being said, that the owner would fix issues that allowed the ECM to make its adjustments to get the idle where it needed to be!?!? ... But if you bought a vehicle with the plugged drilled out and "tampered with" , then I can see the need to get one of these so-called baseline adjustments. Could you please share with me where GM has published the procedure you demonstrate in the video? Thanks!
@@3rdGenC10s ok....well that wasn't GM published, it was for a motor home. But thanks! I have a '91 and when I got it back from transmission shop some years ago, they mentioned the idle amd took it upon themselves to break into that factory protected idle screw. And sooooooo,.I thought to check out this video as it is idling far to high still. I probably will check out doing what is mentioned here. However, I would think that GM would state something like.... , for your vehicle, the idle screw was set to a certain amount of turns blah, blah, blah and then " Sealed" to never be turned again. And therefore the idle screw wouldn't be turned dependant on how the engine was running, rather, the owner would know precisely how far that screw was turned in by the factory. Make sense?
@3rdGenC10s
Жыл бұрын
@@rickr2029 no offense but you can google just as easily as I can.
@rickr2029
Жыл бұрын
@@3rdGenC10s no offense, but I did that beforehand and your the one with the channel.that sent a link that wasn't GM. I "nicely" presented you my scenario. And instead of commenting that there is limited or NO GM info, you tell me I can Google it. And had you taken that route, you would have had another subscriber. Subscribers/Subscriptions are not an entitlement just because a video is posted. Thanks anyway!
@3rdGenC10s
Жыл бұрын
@@rickr2029 I don’t know how to say this without it coming off bad so I’ll just say it. I don’t need your sub, one sub/view won’t make or break me. I do these videos for fun and to help others out. The monetary gain I receive is minuscule compared to the effort and time I put into the videos I post. So if one person is unhappy with the free content and can’t find the time to google something on their own, I’m okay with no having them subscribe. I will be just fine my channel will be just fine. I do appreciate the view and the comments as they do help out the algorithm and put my video towards the top.
@stevetroyer8583 Жыл бұрын
Great information. When did you remove the jumper wire? Once you unplug the IAC?
@3rdGenC10s
Жыл бұрын
Steps are in the description of the video. Jumper wire dosent get removed until The final step.
@stevetroyer8583
Жыл бұрын
I just replaced the old iac in my 91. Would I use the same method to calibrate the new IAC ? I have a high idle now.
@3rdGenC10s
Жыл бұрын
@@stevetroyer8583 yes
@charleselliott51813 жыл бұрын
Ok I got a 93 Chevy it runs lil hight in park but runs great in gear think that be lil like what u got going on just need to adjusted it some?
@3rdGenC10s
3 жыл бұрын
Does it still idle high after the vehicle is warm?
@charleselliott5181
3 жыл бұрын
Yes like 1100 ish
@sergioherrera73453 жыл бұрын
Do you have to re adjust your throttle position sensor when you adjust the idle? I have a 88 k5 blazer. The idle on it started acting out. New coalant sensor, throttle sensor, iac sensor, and egr valve, and same idle. Im going to try what you suggested next
@sergioherrera7345
3 жыл бұрын
I just got done doing this. I drove it for about 15 min and idle is better. More quite. The only thing that i struggled with was when i disconnected the iac i couldn't get the blazer to stay on. And it was up to temperature when i was doing this. Asoon as i let the pedal go it would turn off. So i just turned the idle screw from 12 to about 6 to get it to atleast stay on. After that i turned idle screw till idle felt stable.. Was the idle way off thats why it wouldn't stay on after disconnecting the iac?
@Tweekedcarrot
3 жыл бұрын
I have an 87 k5 and it's doing the same thing. That actually just helped.
@3rdGenC10s
2 жыл бұрын
Hope you were able to figure it out.
@mamz14042 жыл бұрын
اللهم صل وسلم وبارك على عبدك ورسولك محمدﷺ
@3rdGenC10s
2 жыл бұрын
?
@mountainwolf1
Жыл бұрын
@@3rdGenC10s this person is praying for you and asking for blessings for you. Also thank you for sharing your wisdom.
@3rdGenC10s
Жыл бұрын
Thank you for the translation!
@mountainwolf1
Жыл бұрын
@@3rdGenC10s your welcome Google helps 🙂
@usmankhan19762 жыл бұрын
Nice informative video ... Please let me know about ecu setting in TBI ?
@3rdGenC10s
2 жыл бұрын
Ecu setting?
@frgfgr84562 жыл бұрын
Are stock chip idle specs set to each Pacific engine or make and year? Does idle adjustment/iac replacement affect the timing? Knowing computer will adjust a little give or take. Is it possible to get it exactly right without a diagnostic machine? I know there's lots of factors that can cause non compliant adjustment results, just didn't know if there are secret do's and don'ts...
@3rdGenC10s
2 жыл бұрын
I’m not super familiar with the tbi system. Custom prom chips can help out when adding performance upgrades.
@therealbenavis
2 жыл бұрын
You need a gm obd1 scan tool to see the computer " set rpm ", then follow this to get a base rpm (650-750 usually). The iac can only do so much so you try to get it as close as can
@leviblocker1761 Жыл бұрын
Ordered the parts .. started to dig in , but ran into some seriously seized leaf bolts / bushings. Did you guys run into the same issue ? If so ….. any tips on getting those bolts out ?! We tried heat … banging them out… just about everything other than a press or cutting them.
@3rdGenC10s
Жыл бұрын
I’m thinking this comment was meant for another video of removing leaf spring bushings.
@3rdGenC10s
Жыл бұрын
If so a press would be your best bet for removing a stuck bushing .
@hoopin4you2 жыл бұрын
What size drill bit and how deep to drill the plug? Should be pretty thin, right? I'll be doing this with the TBI in place.
@3rdGenC10s
2 жыл бұрын
Small erthan the plug, and yes it’s thin.
@itsChrisco2 ай бұрын
Dumb question. Are all the steps necessary? Could I just turn the T-20 to make it idle higher?
@jayzenyuhman9095
2 ай бұрын
You actually shouldn't turn that torx to change your idle. It changes the values on the throttle position sensor and can cause transmission shifting issues. You can do everything else he talked about, maybe adjust timing but no touch the throttle screw.
@3rdGenC10s
Ай бұрын
I would follow the steps recommended by GM
@sentinel87113 жыл бұрын
do you leave the jumper wire pluged in while adjusting it
@3rdGenC10s
3 жыл бұрын
Yes
@jamesmumford774
3 жыл бұрын
The purpose of the jumper is to force the IAC to close. After unplugging the IAC with the key on and engine not started, the jumper is no longer needed. You pull the jumper out, start the engine and set the base idle. On an automatic trans vehicle the base idle is supposed to be set at 550-600 RPM. After killing the engine, you reconnect the IAC. The IAC ( which is controlled by the computer) then regulates your idle speed. It should idle faster on cold starts. The IAC also adds air when you put it in gear or turn on the A/C to keep the idle speed up and prevent stalling.
@sentinel8711
3 жыл бұрын
@@jamesmumford774 thank you
@axm22engineer3 жыл бұрын
Do you know how to calibrate a new tps sensor? I've been told you can't just simply install a tps
@3rdGenC10s
3 жыл бұрын
I’ve never messed with it, I did find this article that could be helpful. www.gmcmi.com/wp-content/uploads/2013/02/TBI-Initial-calibration.pdf
@johnreese7352
2 жыл бұрын
Yes you have to drill the blot holes and rotate it back... Then jam a multimeter into the blue wire and one to a ground.... Then you want a reading of 0.58 volts
@deathmetalmachine3 жыл бұрын
I'm having the same problem with my throttle body it's literally doing the same thing for the past year or so I did not know you had to set the throttle on the throttle body
@3rdGenC10s
3 жыл бұрын
slamdeathgrindmachine hopefully this will help you resolve the issue, if you have any questions let me know and I will try and help you figure it out.
@marylandshow70533 жыл бұрын
Would I mess things up if I don't use the jumper wire to replace the part
@3rdGenC10s
3 жыл бұрын
If you are trying to adjust the idle yes, it would never close the IAC and you would never achieve the idle you want.
@jerryclark2297
3 жыл бұрын
@@3rdGenC10s Àà mm A Làà
@worstnightmare97723 жыл бұрын
Would this work on a 94 suburban Silverado edition TBI my ldie is very low in drive or reverse? I have no code's at all just low idle
@3rdGenC10s
3 жыл бұрын
Should be the same procedure to adjust the idle on it.
@worstnightmare9772
3 жыл бұрын
@@3rdGenC10s I just got a new rebuilt TBI does not have the hex screw to adjust idle so I don't think it's the same procedure I haven't installed it yet hoping it'll fix my low idle though air idle control valve is new along with all the sensors including coil
@georgeelliott73532 жыл бұрын
Ok I had same problem w my cammed 87 I turned up. Now the cold start idle is considerably higher than I would like. How do I get a happy medium?
@3rdGenC10s
2 жыл бұрын
You can adjust the idle down.
@georgeelliott7353
2 жыл бұрын
@@3rdGenC10s If I do that I'm back to idle being too low when up to temperature.
@3rdGenC10s
2 жыл бұрын
@@georgeelliott7353 are you setting the hot idle when engine is up to temp?
@georgeelliott7353
2 жыл бұрын
@@3rdGenC10s yes
@3rdGenC10s
2 жыл бұрын
Are you running the stock prom chip
@MrDirty-if7gc3 жыл бұрын
Are you also unplugging the single wire timing lead while adjusting the t20 bit screw?
@3rdGenC10s
3 жыл бұрын
The tan wire?
@MrDirty-if7gc
3 жыл бұрын
@@3rdGenC10s Yes, and thanks for the reply.
@3rdGenC10s
3 жыл бұрын
You won’t disconnect it. That’s the timing advance. You would only disconnect it when setting timing.
@MrDirty-if7gc
3 жыл бұрын
@@3rdGenC10s Thank you
@3rdGenC10s
3 жыл бұрын
@@MrDirty-if7gc yes sir hope it helped!
@taronhowell25233 жыл бұрын
Why do you jump terminals ? Whats that do
@3rdGenC10s
3 жыл бұрын
Pus it in diagnostic mode and closes the IAC.
@benofalltrades Жыл бұрын
When do you remove the jumper wire?
@3rdGenC10s
Жыл бұрын
List of steps are in the description, it is in the final step after key is turned off.
@josemiguelmendez29914 жыл бұрын
Why didn’t you do it in the video ?
@3rdGenC10s
4 жыл бұрын
I didn’t think to bring my tripod with me. I store that vehicle at another location. I was doing everything one handed the day I made that video.
@mustangs201413 жыл бұрын
Hey man I am idling around 2000 rpm right now I had to rewire my iac I can’t seem to find any leaks. Do you think that it’s possible that the iac learned to be at 2,000 and I need to adjust it that much?
@3rdGenC10s
3 жыл бұрын
Did you do an IAC reset when you reinstalled the TBI? Disconnect battery to clear codes, reconnect battery, jump A&B on ALDL connector, turn key on for 30 seconds or so, turn key off, remove jumper from ALDL connector. What happens when you do this is the IAC pintle will extend full-closed and stay there until you turn the key off. At that point the ECM assumes it's closed and has a reference point for any commands it sends to it from there on out.
@mustangs20141
3 жыл бұрын
I will try that tomorrow
@mustangs20141
3 жыл бұрын
But don’t I need to adjust the screw
@3rdGenC10s
3 жыл бұрын
@@mustangs20141 if that does not fix it, adjusting the screw will be you’re next option.
@mustangs20141
3 жыл бұрын
Should I drill the metal cap cover to get to it?
@Lilmiket10002 жыл бұрын
Crazy thing. My car was running but after doing this it wont start anymore.
@3rdGenC10s
2 жыл бұрын
That is crazy.
@johndenelsbeck80753 жыл бұрын
Got a question. Got a ‘94 gmc k1500 with 350 tbi. Did a tune up ( plugs, wires, ignition coil, module, cap and rotor) truck starts as idle ok till I put in gear for reverse or drive. Looses power and wants to die unless I keep giving it gas. Gonna replace the IAC. Anything I should look at?
@3rdGenC10s
3 жыл бұрын
John Denelsbeck is it throwing any codes?
@johndenelsbeck8075
3 жыл бұрын
3rd Gen C10’s no not getting any codes.
@3rdGenC10s
3 жыл бұрын
John Denelsbeck you might check for vacuum leaks.
@johndenelsbeck8075
3 жыл бұрын
3rd Gen C10’s done that. All hoses are connected and been cleaned.
@3rdGenC10s
3 жыл бұрын
John Denelsbeck I’d replace the IAC and see if that fixes it if not I’d break out the carb cleaner and spray everything down like throttle body gasket and hoses just to double check vacuum leaks.
@Pagantalk4 жыл бұрын
What kind of motor is that? 350?
@3rdGenC10s
4 жыл бұрын
Lane wacha 305 it’s gutless as can be lol
@danielbroyles80162 жыл бұрын
It needs to be step-by-step
@3rdGenC10s
2 жыл бұрын
You got it figured out you should go make one.
@MasonStevensss3 жыл бұрын
Hey man, I have an 89 c1500 pickup with the same exact issue, I want to try this but where exactly would I find my A & B connector? Would it be under the hood or under the dash? Or would this step even apply to my truck? Thank you!
@3rdGenC10s
3 жыл бұрын
AllStormOutDoors the connector will be right under the dash on the drivers side. kzread.info/dash/bejne/qJuMtbp8gtzdYto.html This video should explain how to put it in diagnostic mode. The steps should be the same for you’re model as well!
@MasonStevensss
3 жыл бұрын
@@3rdGenC10s Thank you so much for the quick response, very helpful!!
@3rdGenC10s
3 жыл бұрын
If you have any more questions you can email me at Z_J_Musgrove@Yahoo.com Shoot me an email if you have any more questions and I’ll get you my number and I’ll try and help you out!
@stevehlabse5537
2 жыл бұрын
Plug is under dash near fuse panel
@wildbillfirehands2 жыл бұрын
You didn't show screw adjust...
@3rdGenC10s
2 жыл бұрын
You turn it. I’m very small increments. Hard to film everything when you are by ypurself.
@wildbillfirehands
2 жыл бұрын
@@3rdGenC10s Thanks. I'd like to hear a summary. Like, " warm engine, shut off, X a+b terminals, key on for 30 seconds, (hear noise in air controller) key off..Disconnect air controller. (disconnect battery for 5 mins ??) restart engine, oh, I'm lost
@3rdGenC10s
2 жыл бұрын
@@wildbillfirehands there is a list of steps in the description.
@BabblingBrookemountain Жыл бұрын
Longest intro ever
@3rdGenC10s
Жыл бұрын
I’ll try and trim the fat out of it next time.
@rudyromero552
11 ай бұрын
Trim it to lean
@662kc Жыл бұрын
I thought this was TJ watt.
@3rdGenC10s
Жыл бұрын
I usually get Matt Damon or Chris Pine
@LB-gb5lk2 жыл бұрын
You NEEDED to be CLEARER with your STEPS! Everybody doesn’t know what you know! So when “teaching” people on HOW to fix something? You MUST DUMB IT DOWN! Things like! When holding the video camera? Use your other hand and LITERALLY PUT YOUR FINGER ON THE PART YOU ARE TALKING ABOUT! It helps the beginner KNOW what you are talking about! (Like the Idle air control valve). Then… LIST YOUR STEPS “IN ORDER”
@3rdGenC10s
2 жыл бұрын
Man it seems like you have it figured out. I think you should post a video the correct way.
@blueelvis.2 ай бұрын
Procrastinate. Dang bubs get to the point. Thumbs down.
Пікірлер: 183
This are the steps I took on my 1995 GMC Sierra whose base idle was consistently running 1200+ rpm (too high). 1) warm to operating temp; 2) engine off, jump A-B; 3) key on, engine off; 4) 30 secs for IAC to close; 5) unplug IAC; 6) remove jumper; 7) engine on with idle racing about 1800 rpm; 8) adjust idle screw with 20 torx--counterclockwise one half turn--note: engine does not respond at this step; 9) engine off, plug in IAC; 10) test engine on: idle=750-800; 11) engine off and unplug battery 30+ secs to reset any codes. On restart, engine maintained 800ish rpm at idle warm. Note that my setup includes a rebuilt TBI by SPR Performance with double bushings at the throttle butterfly valve to prevent fuel seepage caused by pressure from the ATI Procharger. I hope these notes answer the question as to how much of a twist of the adjustment screw is needed and what to expect when turning it.
@3rdGenC10s
Жыл бұрын
Nice
@chucklaneChuckylane
Ай бұрын
I finally figured out that the plug for the TPS was bad, cut it back a few inches & wa-la! Idles at 600 now & runs perfect..only took me 7 years to figure that out, if all the contacts are good the plug itself don't necessarily have to be good automatically. DOH! 😂
@AustinMiilbarge
6 күн бұрын
The thing is you guys finally fixed the problem thanks for your dedication to solving the problem for all of us..May God bless you 🙏
Thanks my dude your a real one for sure, I’m gonna adjust my tbi later on my 91 s10. The problem I’m having is during acceleration my truck kinda bogs down, 1st,2nd gear kinda bogs 3rd gears seems like it kicks then the 4.3 is happy again, then stop light comes up, and oil pressure tach goes down, and so does the gas gauge, sometimes the truck will turn off if I don’t have my foot on gas a little.
@3rdGenC10s
14 күн бұрын
Glad I could help!
Gracias amigo, si funciono en mi chevy 350 1990 saludos desde monterrey n.l. mexico
@3rdGenC10s
4 жыл бұрын
Sergio Malacara Genial, ¡me alegro de que el video te haya podido ayudar! ¡Agradezco el apoyo!
Finally I learned something about the TBI that I didn't have to second guess whatever issue I was having at the time! I've had a 1994 GMC Sonoma for going on 8 years now, I love the truck, rwd, 4.3, automatic, ex cab, that was crashed a little bit so I put a frame horn on & went from there. I drive a little aggressive but in Reno if you don't, you'll get sucked right in to the non stop circus of the lamest people trying to drive without a clue what they're doing! Traffic tripled here in a less than two years, being a local, I know every back alley & side street there is so I mash the pedal & jam! I'm a former m/ racer so it's not like I'm just going fast like the rest of em', I pay attention to my every move in advance & don't look at my phone ever! But it's been a lot harder to do when I find that I can't rely on a strong little v6 to get with the program when a car is heading my way & I can't afford a stall or sputer that I have to feather the throttle with in order to not slammed. I've got an older 4.3 not a vortex anymore, but this is a strong engine, I also freshened it up with crane roller rockers, new push rods, oil pump, timing set up, all new sensors, which ain't much for a 94 on the cusp of KISS to more complicated than it's worth with all of the OBD 2 garbage, my buddy completely rebuilt my transmission with Corvette servos, after going thru transmission blues between getting ripped off for one tranny, a piss poor mechanic who supposedly knew tranny's, bla, bla, & four transmissions later, I have a Vette trans or a Camaro one, both the same, but built right with not a leak anyplace. He helped me install the new old 4.3 & it's truly a great truck with plenty of power when I want it, all of this was done and it was a happy place..until the very first cold night every year, then it would start tripping out & revving like the throttle was stuck, about 2500 for a few minutes then slowly start to drop off & then it'd go down to about 1200 for a minute or so, then it'd drop to 800 after the whole thing played out over a ten minute time span that seemed like 30 minutes half the time, not to mention fuel at 4.00+ for ever, or until it scrapes the paint off of a 5 dollar bill every few months. But then it would run great, no problem all day until the next morning, then the same shit all over again until spring came along, then it'd light right up, no high idle, no waiting to leave, ran perfect, until winter again, wash, rinse, repeat, every year with not one person on being able to tell me something I had not already tried to no avail. I had new TPS, new IAC, new temp sensors, new MAP sensor, new Mass air flow, new vacuum lines, all of the wiring is on the firewall, like an old school ride, not being bbq' on top of the engine like factory, I did that right away, but with literally every sensor new at the exact same time when I put the other engine in, it started doing all of the high revving stuff again, it made no sense to anyone, yes, I even put a new computer in & it was a BDYT exactly as the one it had new, I now have a complete set i can change out in a few minutes whenever I thought maybe its something else? I just went thru this two weeks ago, & rather than buy a brand new IAC, I opted for just a new TPS because it was on warranty so maybe it was bad now, it's been three years almost since the new engine, tranny so what the heck, I've asked more people than you could round up for free green beer on St. Patrick's Day & still no logical answers & figured it was just what it's gonna be. The fuel injectors were going me some problems and out of the blue, the idle started acting up but different than the other ones, then it died completely, between scrounging up a set of injectors that would do until I had money, I thought that maybe the TPS again, I didn't know, but this time, all of the sudden, it idled right down, right away and it was freezing outside! So now it ain't screaming bloody murder every morning, but all of the sudden, it was idling a bit too low, & dying on me over the past few days, I tried timing adjustment, nothing would bring it up just a few hundred rpm & I've been raçking my brain trying to to figure out what to do next. I needed to replace the cruise control cable for a long time now & just hadn't gotten around to it until now, that's when I needed to figure how to move the little clip thingy without breaking it, that is what brought me to your video, & you having the answer I probably needed when it was idling high, most likely not, but the point is now it doesn't idle high for whatever it was that I replaced this time that didn't work when I replaced it the previous times, but the high idle is gone, the low idle problem is over now, thanks only to you, because up until this point I was flipping out over finding out my motorcycle insurance just leaped way up because of one speeding ticket I got in my truck last fall, and never had a violation period on my motorcycle in more than 36 years, but now my fucking insurance automatically raised it because maybe I'm gonna go wild in the streets like Marlon Brando because I got a ticket in my truck, but need two classes of license and never had a ticket on a hot rod motorcycle, so I'm automatically guilty when my truck & my bike don't have anything in common period, I guess if I step on a bug outside, and kill it, I'm going to start being a serial killer by next week! Fucking burocratic bullshit, I want to sue em' but I'm white,so that won't work, but you sir,made my fucking day & I thank you very much for the useful information that I needed today of all days, you rock! 🏁✌️
@3rdGenC10s
Ай бұрын
Hell yeah brother!
@chucklaneChuckylane
Ай бұрын
It was the plug for the TPS! Now it's dialed in & I didn't have to change the idle screw. Goes to show it don't have to look bad to be shit! Still loved your video, thanks✌️🏁
That tach threw me for a loop when it rolled up to the top. Quite functional though!
@3rdGenC10s
3 жыл бұрын
Yes sir didn’t want to drill any holes.
I had a high idle problem on my 89 Blazer. I did the jumper wire to A & B, turned the key on for a minute, disconnected, the battery for awhile and it seems to be starting up and idling about right now
@3rdGenC10s
11 ай бұрын
Hope it helped you out.
Just what i needed thanks for the video.
@3rdGenC10s
3 жыл бұрын
No problem, I appreciate the support
Nice Vid. I have a Jeep with a GM 4.3L TBI, was working like a charm for 10 or so years, and all of a sudden it no longer wants to start in the morning. it fires a couple cylinders and then basically floods. If you hold it to the floor after, it Puffs and chugs until it clears out. Once warm, it runs nice and will start fine all day long, but the next morning same flooding issue. I can see all my sensors are working with WinALDL. Very strange. Any suggestions
@3rdGenC10s
8 ай бұрын
Maybe look into rebuilding the throttle body. Kits are cheap and simple, I would also check the injector flow as well. You can cycle the injectors with a 9v battery.
You never said when you are supposed to remove the jumper wire, is it before or after you start the truck?
@3rdGenC10s
Жыл бұрын
Steps are in the description.
@cjimijam
3 ай бұрын
Me too steps in the description arent the answer but will listen again thanks
This worked great, fixed my problem, thank you so much.
@3rdGenC10s
3 жыл бұрын
Awesome! I appreciate the support!
I happen to have one of the code readers.. At what point in this do I unplug it? And should I have it set to emc or abs?
@3rdGenC10s
Ай бұрын
All the steps are in the description, I haven’t messed with a tbi in years so I can’t remember off the top of my head.
Bout to try this right now just swapped my blown 4.3 for a free 5.0 having the same issues already got a Ecu to match the motor just can’t get the idle right either have to adjust the throttle to 1200-1500 and it still doesn’t like it and I don’t have ac right now, maybe 🤔 this summer in this Texas Heat 🥵
@3rdGenC10s
2 жыл бұрын
Hope it helps.
I got a 92 s10 with the 2.8 v6. And it's over due for age maintenance.. I got gm code 44 and 46 if I watched the flashes rights. 44 lean and 46 faulty key cylinder. Years ago my father played with the 🐈. So south carolina don't check....cats... so it went away. How do I fix the lean for only having one of o2 sensor left. Yes I got a muffler single pipe.
@3rdGenC10s
Ай бұрын
I’m not real sure on that haven’t messed with a TBI in years.
@3rd Gen C10’s I have a 87 chevy silverado v10 5.7 tbi that has surging idle hard cold start and can not get rid of it I think this might do the trick any advice? Thanks godbless be well.
@3rdGenC10s
Жыл бұрын
Just follow the steps listed on the description of the video.
Esto lo gue estava buscando gracias 😊
@3rdGenC10s
11 ай бұрын
¡Me alegra que te haya ayudado!
This helped but have a total different question when engine is cold has to have temperature sensor plugged in to get it started have to plug it out on engine is warm or we'll stall when stepping on the gas
@3rdGenC10s
2 жыл бұрын
I would verify fuel pressure before unplugging the CTS, sounds like the fuel pump could be going out.
@richardwurz5197
2 жыл бұрын
@@3rdGenC10s brand new fuel pump
@3rdGenC10s
2 жыл бұрын
@@richardwurz5197 I’d verify fuel pressure
If you do this u must adjust the tps. It’s adjustable too.
@3rdGenC10s
2 жыл бұрын
Good tip
Does the iac stop making noise when its fully closed ?
@3rdGenC10s
3 ай бұрын
It should.
I don't think you really need to or do you jump the OBD into the Iac I think you can just adjust it without having to do that I don't know though
@3rdGenC10s
10 ай бұрын
It’s my understanding you want the IAC closed when adjusting it from everything I’ve seen online
Oh this is gonna be fun on my 91 G20 van replaced the IAC now its too high
@3rdGenC10s
3 жыл бұрын
Yeah I bet on you’re van it’ll be fun
@dermharse9614
3 жыл бұрын
@@3rdGenC10s All good now wasnt so bad just used the torq-bit and small ratchet under the dog house got lucky no drilling the plug on the tbi, after changing the IAC it was idle at 2k now i got it down to where it barley enguages the torque averter, thanks for the video!
@3rdGenC10s
3 жыл бұрын
Yes sir, I appreciate the support!
How did you install the RPM guage.y truck doesn't have one. And I'll need the gauge to set the idle
@3rdGenC10s
Жыл бұрын
Just followed the instructions. Tapped into the fuse panel and the coil.
Putting out there to check the park neutral switch as it controls in gear rpm. It's dumb and not conventional but that's how they did it with tbi
@3rdGenC10s
2 жыл бұрын
Good tip
Do you plug the IAC plug in before you adjust the idle or leave it unplugged until after?
@3rdGenC10s
2 жыл бұрын
Steps are listed in the description. It’s been so long since I did it I don’t remember the exact steps.
@dboles9193
2 жыл бұрын
@@3rdGenC10s I found the steps. I set my idle to 650 700 rpms and after I drove it they were back at 1000. I just got the truck and supposedly it's a 383 stroker. I found a hyper tech chip in the glove box for a 5.7 now wondering if maybe there's one on the emc for 383 that's overriding what I'm doing and bringing the idle back up
@dboles9193
2 жыл бұрын
@@3rdGenC10s what else could be the problem? Injectors are new. IAC is new. Everything is pretty much new. He finished it all at the end of 2020. I havent had anything that I've had to work on in a long time. Just trying refamiliariz myself with being a mechanic again.
i see with your truck running your oil pressure gauge is reading pass 60 at idle are your gauge working
@3rdGenC10s
3 жыл бұрын
Factory oil gauge doesn’t work. I’m running a aftermarket oil gauge.
That’s a badass truck bro!!
@3rdGenC10s
3 жыл бұрын
Thanks man!
Wasn't the idea of the factory plugged torx screw for it to "NEVER" be tampered with? That it is supposed to be exactly where it needs to be? And so with that being said, that the owner would fix issues that allowed the ECM to make its adjustments to get the idle where it needed to be!?!? ... But if you bought a vehicle with the plugged drilled out and "tampered with" , then I can see the need to get one of these so-called baseline adjustments. Could you please share with me where GM has published the procedure you demonstrate in the video? Thanks!
@3rdGenC10s
Жыл бұрын
www.gmcmi.com/wp-content/uploads/2013/02/TBI-Initial-calibration.pdf
@rickr2029
Жыл бұрын
@@3rdGenC10s ok....well that wasn't GM published, it was for a motor home. But thanks! I have a '91 and when I got it back from transmission shop some years ago, they mentioned the idle amd took it upon themselves to break into that factory protected idle screw. And sooooooo,.I thought to check out this video as it is idling far to high still. I probably will check out doing what is mentioned here. However, I would think that GM would state something like.... , for your vehicle, the idle screw was set to a certain amount of turns blah, blah, blah and then " Sealed" to never be turned again. And therefore the idle screw wouldn't be turned dependant on how the engine was running, rather, the owner would know precisely how far that screw was turned in by the factory. Make sense?
@3rdGenC10s
Жыл бұрын
@@rickr2029 no offense but you can google just as easily as I can.
@rickr2029
Жыл бұрын
@@3rdGenC10s no offense, but I did that beforehand and your the one with the channel.that sent a link that wasn't GM. I "nicely" presented you my scenario. And instead of commenting that there is limited or NO GM info, you tell me I can Google it. And had you taken that route, you would have had another subscriber. Subscribers/Subscriptions are not an entitlement just because a video is posted. Thanks anyway!
@3rdGenC10s
Жыл бұрын
@@rickr2029 I don’t know how to say this without it coming off bad so I’ll just say it. I don’t need your sub, one sub/view won’t make or break me. I do these videos for fun and to help others out. The monetary gain I receive is minuscule compared to the effort and time I put into the videos I post. So if one person is unhappy with the free content and can’t find the time to google something on their own, I’m okay with no having them subscribe. I will be just fine my channel will be just fine. I do appreciate the view and the comments as they do help out the algorithm and put my video towards the top.
Great information. When did you remove the jumper wire? Once you unplug the IAC?
@3rdGenC10s
Жыл бұрын
Steps are in the description of the video. Jumper wire dosent get removed until The final step.
@stevetroyer8583
Жыл бұрын
I just replaced the old iac in my 91. Would I use the same method to calibrate the new IAC ? I have a high idle now.
@3rdGenC10s
Жыл бұрын
@@stevetroyer8583 yes
Ok I got a 93 Chevy it runs lil hight in park but runs great in gear think that be lil like what u got going on just need to adjusted it some?
@3rdGenC10s
3 жыл бұрын
Does it still idle high after the vehicle is warm?
@charleselliott5181
3 жыл бұрын
Yes like 1100 ish
Do you have to re adjust your throttle position sensor when you adjust the idle? I have a 88 k5 blazer. The idle on it started acting out. New coalant sensor, throttle sensor, iac sensor, and egr valve, and same idle. Im going to try what you suggested next
@sergioherrera7345
3 жыл бұрын
I just got done doing this. I drove it for about 15 min and idle is better. More quite. The only thing that i struggled with was when i disconnected the iac i couldn't get the blazer to stay on. And it was up to temperature when i was doing this. Asoon as i let the pedal go it would turn off. So i just turned the idle screw from 12 to about 6 to get it to atleast stay on. After that i turned idle screw till idle felt stable.. Was the idle way off thats why it wouldn't stay on after disconnecting the iac?
@Tweekedcarrot
3 жыл бұрын
I have an 87 k5 and it's doing the same thing. That actually just helped.
@3rdGenC10s
2 жыл бұрын
Hope you were able to figure it out.
اللهم صل وسلم وبارك على عبدك ورسولك محمدﷺ
@3rdGenC10s
2 жыл бұрын
?
@mountainwolf1
Жыл бұрын
@@3rdGenC10s this person is praying for you and asking for blessings for you. Also thank you for sharing your wisdom.
@3rdGenC10s
Жыл бұрын
Thank you for the translation!
@mountainwolf1
Жыл бұрын
@@3rdGenC10s your welcome Google helps 🙂
Nice informative video ... Please let me know about ecu setting in TBI ?
@3rdGenC10s
2 жыл бұрын
Ecu setting?
Are stock chip idle specs set to each Pacific engine or make and year? Does idle adjustment/iac replacement affect the timing? Knowing computer will adjust a little give or take. Is it possible to get it exactly right without a diagnostic machine? I know there's lots of factors that can cause non compliant adjustment results, just didn't know if there are secret do's and don'ts...
@3rdGenC10s
2 жыл бұрын
I’m not super familiar with the tbi system. Custom prom chips can help out when adding performance upgrades.
@therealbenavis
2 жыл бұрын
You need a gm obd1 scan tool to see the computer " set rpm ", then follow this to get a base rpm (650-750 usually). The iac can only do so much so you try to get it as close as can
Ordered the parts .. started to dig in , but ran into some seriously seized leaf bolts / bushings. Did you guys run into the same issue ? If so ….. any tips on getting those bolts out ?! We tried heat … banging them out… just about everything other than a press or cutting them.
@3rdGenC10s
Жыл бұрын
I’m thinking this comment was meant for another video of removing leaf spring bushings.
@3rdGenC10s
Жыл бұрын
If so a press would be your best bet for removing a stuck bushing .
What size drill bit and how deep to drill the plug? Should be pretty thin, right? I'll be doing this with the TBI in place.
@3rdGenC10s
2 жыл бұрын
Small erthan the plug, and yes it’s thin.
Dumb question. Are all the steps necessary? Could I just turn the T-20 to make it idle higher?
@jayzenyuhman9095
2 ай бұрын
You actually shouldn't turn that torx to change your idle. It changes the values on the throttle position sensor and can cause transmission shifting issues. You can do everything else he talked about, maybe adjust timing but no touch the throttle screw.
@3rdGenC10s
Ай бұрын
I would follow the steps recommended by GM
do you leave the jumper wire pluged in while adjusting it
@3rdGenC10s
3 жыл бұрын
Yes
@jamesmumford774
3 жыл бұрын
The purpose of the jumper is to force the IAC to close. After unplugging the IAC with the key on and engine not started, the jumper is no longer needed. You pull the jumper out, start the engine and set the base idle. On an automatic trans vehicle the base idle is supposed to be set at 550-600 RPM. After killing the engine, you reconnect the IAC. The IAC ( which is controlled by the computer) then regulates your idle speed. It should idle faster on cold starts. The IAC also adds air when you put it in gear or turn on the A/C to keep the idle speed up and prevent stalling.
@sentinel8711
3 жыл бұрын
@@jamesmumford774 thank you
Do you know how to calibrate a new tps sensor? I've been told you can't just simply install a tps
@3rdGenC10s
3 жыл бұрын
I’ve never messed with it, I did find this article that could be helpful. www.gmcmi.com/wp-content/uploads/2013/02/TBI-Initial-calibration.pdf
@johnreese7352
2 жыл бұрын
Yes you have to drill the blot holes and rotate it back... Then jam a multimeter into the blue wire and one to a ground.... Then you want a reading of 0.58 volts
I'm having the same problem with my throttle body it's literally doing the same thing for the past year or so I did not know you had to set the throttle on the throttle body
@3rdGenC10s
3 жыл бұрын
slamdeathgrindmachine hopefully this will help you resolve the issue, if you have any questions let me know and I will try and help you figure it out.
Would I mess things up if I don't use the jumper wire to replace the part
@3rdGenC10s
3 жыл бұрын
If you are trying to adjust the idle yes, it would never close the IAC and you would never achieve the idle you want.
@jerryclark2297
3 жыл бұрын
@@3rdGenC10s Àà mm A Làà
Would this work on a 94 suburban Silverado edition TBI my ldie is very low in drive or reverse? I have no code's at all just low idle
@3rdGenC10s
3 жыл бұрын
Should be the same procedure to adjust the idle on it.
@worstnightmare9772
3 жыл бұрын
@@3rdGenC10s I just got a new rebuilt TBI does not have the hex screw to adjust idle so I don't think it's the same procedure I haven't installed it yet hoping it'll fix my low idle though air idle control valve is new along with all the sensors including coil
Ok I had same problem w my cammed 87 I turned up. Now the cold start idle is considerably higher than I would like. How do I get a happy medium?
@3rdGenC10s
2 жыл бұрын
You can adjust the idle down.
@georgeelliott7353
2 жыл бұрын
@@3rdGenC10s If I do that I'm back to idle being too low when up to temperature.
@3rdGenC10s
2 жыл бұрын
@@georgeelliott7353 are you setting the hot idle when engine is up to temp?
@georgeelliott7353
2 жыл бұрын
@@3rdGenC10s yes
@3rdGenC10s
2 жыл бұрын
Are you running the stock prom chip
Are you also unplugging the single wire timing lead while adjusting the t20 bit screw?
@3rdGenC10s
3 жыл бұрын
The tan wire?
@MrDirty-if7gc
3 жыл бұрын
@@3rdGenC10s Yes, and thanks for the reply.
@3rdGenC10s
3 жыл бұрын
You won’t disconnect it. That’s the timing advance. You would only disconnect it when setting timing.
@MrDirty-if7gc
3 жыл бұрын
@@3rdGenC10s Thank you
@3rdGenC10s
3 жыл бұрын
@@MrDirty-if7gc yes sir hope it helped!
Why do you jump terminals ? Whats that do
@3rdGenC10s
3 жыл бұрын
Pus it in diagnostic mode and closes the IAC.
When do you remove the jumper wire?
@3rdGenC10s
Жыл бұрын
List of steps are in the description, it is in the final step after key is turned off.
Why didn’t you do it in the video ?
@3rdGenC10s
4 жыл бұрын
I didn’t think to bring my tripod with me. I store that vehicle at another location. I was doing everything one handed the day I made that video.
Hey man I am idling around 2000 rpm right now I had to rewire my iac I can’t seem to find any leaks. Do you think that it’s possible that the iac learned to be at 2,000 and I need to adjust it that much?
@3rdGenC10s
3 жыл бұрын
Did you do an IAC reset when you reinstalled the TBI? Disconnect battery to clear codes, reconnect battery, jump A&B on ALDL connector, turn key on for 30 seconds or so, turn key off, remove jumper from ALDL connector. What happens when you do this is the IAC pintle will extend full-closed and stay there until you turn the key off. At that point the ECM assumes it's closed and has a reference point for any commands it sends to it from there on out.
@mustangs20141
3 жыл бұрын
I will try that tomorrow
@mustangs20141
3 жыл бұрын
But don’t I need to adjust the screw
@3rdGenC10s
3 жыл бұрын
@@mustangs20141 if that does not fix it, adjusting the screw will be you’re next option.
@mustangs20141
3 жыл бұрын
Should I drill the metal cap cover to get to it?
Crazy thing. My car was running but after doing this it wont start anymore.
@3rdGenC10s
2 жыл бұрын
That is crazy.
Got a question. Got a ‘94 gmc k1500 with 350 tbi. Did a tune up ( plugs, wires, ignition coil, module, cap and rotor) truck starts as idle ok till I put in gear for reverse or drive. Looses power and wants to die unless I keep giving it gas. Gonna replace the IAC. Anything I should look at?
@3rdGenC10s
3 жыл бұрын
John Denelsbeck is it throwing any codes?
@johndenelsbeck8075
3 жыл бұрын
3rd Gen C10’s no not getting any codes.
@3rdGenC10s
3 жыл бұрын
John Denelsbeck you might check for vacuum leaks.
@johndenelsbeck8075
3 жыл бұрын
3rd Gen C10’s done that. All hoses are connected and been cleaned.
@3rdGenC10s
3 жыл бұрын
John Denelsbeck I’d replace the IAC and see if that fixes it if not I’d break out the carb cleaner and spray everything down like throttle body gasket and hoses just to double check vacuum leaks.
What kind of motor is that? 350?
@3rdGenC10s
4 жыл бұрын
Lane wacha 305 it’s gutless as can be lol
It needs to be step-by-step
@3rdGenC10s
2 жыл бұрын
You got it figured out you should go make one.
Hey man, I have an 89 c1500 pickup with the same exact issue, I want to try this but where exactly would I find my A & B connector? Would it be under the hood or under the dash? Or would this step even apply to my truck? Thank you!
@3rdGenC10s
3 жыл бұрын
AllStormOutDoors the connector will be right under the dash on the drivers side. kzread.info/dash/bejne/qJuMtbp8gtzdYto.html This video should explain how to put it in diagnostic mode. The steps should be the same for you’re model as well!
@MasonStevensss
3 жыл бұрын
@@3rdGenC10s Thank you so much for the quick response, very helpful!!
@3rdGenC10s
3 жыл бұрын
If you have any more questions you can email me at Z_J_Musgrove@Yahoo.com Shoot me an email if you have any more questions and I’ll get you my number and I’ll try and help you out!
@stevehlabse5537
2 жыл бұрын
Plug is under dash near fuse panel
You didn't show screw adjust...
@3rdGenC10s
2 жыл бұрын
You turn it. I’m very small increments. Hard to film everything when you are by ypurself.
@wildbillfirehands
2 жыл бұрын
@@3rdGenC10s Thanks. I'd like to hear a summary. Like, " warm engine, shut off, X a+b terminals, key on for 30 seconds, (hear noise in air controller) key off..Disconnect air controller. (disconnect battery for 5 mins ??) restart engine, oh, I'm lost
@3rdGenC10s
2 жыл бұрын
@@wildbillfirehands there is a list of steps in the description.
Longest intro ever
@3rdGenC10s
Жыл бұрын
I’ll try and trim the fat out of it next time.
@rudyromero552
11 ай бұрын
Trim it to lean
I thought this was TJ watt.
@3rdGenC10s
Жыл бұрын
I usually get Matt Damon or Chris Pine
You NEEDED to be CLEARER with your STEPS! Everybody doesn’t know what you know! So when “teaching” people on HOW to fix something? You MUST DUMB IT DOWN! Things like! When holding the video camera? Use your other hand and LITERALLY PUT YOUR FINGER ON THE PART YOU ARE TALKING ABOUT! It helps the beginner KNOW what you are talking about! (Like the Idle air control valve). Then… LIST YOUR STEPS “IN ORDER”
@3rdGenC10s
2 жыл бұрын
Man it seems like you have it figured out. I think you should post a video the correct way.
Procrastinate. Dang bubs get to the point. Thumbs down.
@3rdGenC10s
2 ай бұрын
I’m heartbroken