I really liked how you showed most of what you did, not many things happened off camera. I also liked that you talked about what each part on the TBI was, for those who aren't so knowledgable. TY.

My son and I rebuilt the throttle body for his 87 chevy R10. It was night and day difference. I STRONGLY recommend buying a ultrasonic cleaner from HF. Also, the rebuild kits come with 2 long screws for helping put it all back together without pinching the diaphragm. LASTLY, get some Simple Green HD PURPLE! Regular Simple green will degrade aluminum. Great video dude!

@TravisReddell

4 жыл бұрын

Thanks, I was wondering what those long screws were for.

Hey, just wanted to thank you for a great tutorial. My long awaited startup should happen within the week and the throttle body is about the only thing I am not nervous about.

My '90 Silverado 350 TBI needs this done. Thank you much for this awesome combination of quick but VERY detailed video, best of the maybe 5 or 6 others I've watched. Thank you.

@shadowopsairman1583

3 жыл бұрын

See if there is a difference with the 454 and the 262

Just wanted to say thanks. You made a very well put together video.It had all info needed without a bunch of useless talk .I watched it one time, then ordered parts and did my own with no problems. Thanks again!!!!

This video rocks!!! I did the rebuild with this as my guide & it all came together perfectly!! Thank you so much, saved me some dough on my work van.

Thanks man this video really helped me rebuild my tb today. Truck seems to be idiling smoother and acceleration seems better! Again thanks!

Thanks for this video! This is going to really help me with my '85 Cadillac. It's engine was replaced in 1994, so the throttle body injection thing is almost identical to this one.

My 91 K1500 has been sitting for about 2 years now without running. Thanks for giving me a better view into what’s going on inside that unit.

Excellent video! I will be rebuilding my TBI in the next couple of days and now I know what to expect. Awesome :)

This is a great video. No useless blah blah talk. Very informative. I am a little confused on how to and why the regulator needs adjustment and the need to drill out and insert the new style adjusting toolOther than that an excellent video. Thanks

@FuelInjectionSucks

9 жыл бұрын

+Thomas McHugh It's just an aftermarket regulator to raise fuel pressure, it is not required at all, just something optional I did. Some of the OE regulator housings are also adjustable. They have a set screw that is loctited in to a set pressure, but there is no way to get to the screw without first taking the throttle body apart.

@thomasmchugh845

9 жыл бұрын

+Fuel Injection Sucks Thank you for your reply to my inquiry which explained everything . I think I needed to also to view your part two video which I did to understand the adjustable regulator setup. Appreciate you taking the time to reply to my comment.

@1169tech

8 жыл бұрын

Older cars and trucks get worn out. Being able to adjust pressure, allows for better performance..

@icefishingmn5879

5 жыл бұрын

I added new injectors and now it leakes fuel and doesn't turn over or start any help would be helpful. Thanks

I'm a big fan of the TBI having grown up with carbs. Any type of fuel injection is a lot simpler than any carburetor. Fortunately for the motor heads born after 1985, almost all cars and trucks are fuel injected now. This is an excellent video. He speaks clearly and sticks to the subject at hand. The only thing I would add would be to apply some sort of lube on the O-rings before installation particularly on the ones on the injectors. I've found that those seals could roll out of their grooves when pressing the injectors in.

@carlosvalentin856

5 жыл бұрын

Yes you should add some trany oil on the rings. Good thought, he also did not show how to put in regulator spring. I thought the video was helpful. On till i try to put in that spring. I buy a rebuild kit it has two screws long about two inches. That is the only way that you can put in that spring. is with those screws. It took me two hours to figure it out. When you make a video, you have to show the hardest parts also. I ran into some trouble with that spring.

@galehess6676

5 жыл бұрын

@@carlosvalentin856 how is this done?

@carlosvalentin856

5 жыл бұрын

@@galehess6676 watch the other videos on this than u will learn.

@AZStarYT

2 жыл бұрын

​@@galehess6676 You could just buy a couple long screws at Ace (match the threads to the short ones used on the regulator). Put the spring in the cap and see about how far off the base the flange is, then pick screws about that long or a little bit shorter. Install them on opposite corners and tighten evenly. You're just wanting to use them to guide the body while you push down so it doesn't push the diaphragm in to one side or the other and damage it. Once you have two of the short screws in (not tight yet), remove the long ones and put the other two short screws in. THEN tighten them, doing opposite sides (cross pattern). I grew up in a machine shop, so always like to snug screws first on anything, then torque to spec if given. Just remember you're working with soft cast aluminum and steel screws, so if you have no torque specs, go just a little past snug, don't overtighten.

@galehess6676

2 жыл бұрын

@@AZStarYT Thanks for the details!

I'm going to pick up a kit this morning to do my '89 gmc c3500's 7.4l tbi. I know it will be a bit different but thanks for the awesome video. Have rebuilt carbs before, but not tbi. Am going to add the regulator you suggested. ☺

So glad u made this video man lol. 9 years later and this is helpful as he!!.

Great job there... Nice seems easy to do, gonna get mine rebuild thanks for posting have a great day...

Don't expect the world, but I will say this. Every year I take this truck across PA for a car show, usually it uses half a tank each way. This year it went the whole trip and only used between 1/4 and 1/3 of a tank TOTAL. So something changed.

@Gabriel.4190

5 жыл бұрын

Are you implying its cause of the TBI rebuild.

Great video with excellent explanations on how this works. Thanks

Thank you so much for this video. You're awesome!

great tutorial you inspired me I'm going to rebuild mine thank you

great video ya did a great job talking your way through it informative

That is pretty cool I just picked up a 1987 GMC 1 Ton and should probably look at rebuilding the TBI throttle body.

Fantastic job making this video! I've got a '90 'burb that I've been wanting to do this too, including the adjustable fuel pressure regulator, and gauge. Will probably even mod the tops of the venturi's and take off that raised band, and put the plastic pod spacer in. The truck does a lot of towing, so anything that helps with power output and maybe fuel mileage, is worth doing.

@cecilsabourin9462

Жыл бұрын

So any info on fuel presure differences , would a simple internal spring spacer ( washer) do just as well ? ,PS your sound level is way to low .Did u flush the injectors ?

2009 ram 1500 fuel injection perfect bought new never fail to start im 88 this is the best truck of my life and iv owned quite a few

I installed the CFM Technologies adjustable pressure regulator in my 1992 454 TBI 2 weeks ago. A couple of comments about the video. First, bending that vacuum tube below the new pressure adjuster thumb wheel does nothing. The thumb wheel is so close to the base of the metal tube that bending it does not provide any additional clearance that I could see. What I discovered was that I needed to screw in that thumb wheel A LOT more that I originally thought. There was tons of clearance when I got the pressure set to 13 psi. Lesson? Don't bend the tube at all (this is assuming you are still using the old stock spring in the regulator). In the rebuild kit there were two very, very, very, very, very small round filter screens. I am talking about 1/8" in each direction. After calling CFM Tech (GREAT tech support by the way), they said these go in the side of the injectors below the sealing o-rings. Never would have seen that or figured that out without that info. Definitely buy the fuel pressure gauge and adapter. You can't adjust what you cant measure. The net result? My 1992 31 foot Fleetwood Bounder went from 5.2 mpg to 6.67 mpg. NICE! Still working on a couple other issue with wide open throttle performance but there is no question adding this adjustable regulator absolutely helps. WAY more power and 20% better fuel economy.....Nice :-)

@randy1ization

5 жыл бұрын

how does the higher fuel pressure make more power

@KJTUSKJTUS

5 жыл бұрын

@@randy1ization because the combustion within a cylinders goes off of an air fuel ratio(afr). The ideal afr is 14.7:1. Assuming that at 13psi of fuel is at 14.7:1 or less (i.e 13.5-14:1) you will be running slightly rich providing the best combustion, fuel economy, and power. Without the proper fuel pressure you are running rich, too much gas (less than 14.7:1) which is fine but you are losing power and fuel economy. Or you're running lean, too little fuel (more than 14.7:1) which is bad because the heat within the combustion chamber can melt Pistons, rings, etc. And you will also be losing power

@CrimsonSkyz500

5 жыл бұрын

@@KJTUSKJTUS does increasing PSI not mess with the onboard computer?

@waynewilliams5802

3 жыл бұрын

@chrissmith...hey mane how hard was it to do bone

@chrissmith9858

3 жыл бұрын

@@waynewilliams5802 Sorry for the delayed response....life events, covid, etc......:-). If you've ever rebuilt a standard carb with float chambers, jets, etc. This is about the easiest job you'll ever do. While they were out, I did take the time to send the injectors off for testing/cleaning (lots of companies around that do this). Since I posted this, I also noticed that I was still losing power when climbing hills as I pressed the accelerator hard. It seems like I had more power when my foot was lightly on the accelerator pedal versus firmly pressing down. I finally decided to check the base timing which I've never worried about in the past, because once set, it shouldn't move. The engine computer relies on the base timing to be exactly 4° BTDC (on this engine) in order to do it's job correctly. What I discovered was it was set to 4° ...... ATDC! The prior owner saw a 4° mark and set it to that, but it was the ATDC mark. The engine was basically running 8° retarded. After fixing THAT minor little issue, the motorhome was leaping up long hills when accelerating hard (as much as a big motorhome can leap) and the fuel economy went up to around 9.2 MPG. Nice.....

Thanks for the video! It was very easy to understand. I'm gonna follow the video when I do

Nice job on your video. Great work and very simple. It helped me a lot. Thanks mate!

I like how you explain what the parts are supposed to do

subbed thanks for clear understandable info with no mindless ramble or death rattle music. am doing mine soon while watching yours ..Its that Good !

Very good video the diaphragm and the spring is tuff though.

I modified my TBI by taking it and the intake off, putting it on the bottom shelf in my garage, and replacing it with an Edelbrock 1406 carburetor. :)

I saw a project where they ran two of the throttle bodys, I think only a single idle air motor. And paralleled the injectors! With a bit of ecm programming. I thought about doing it myself. But a 750 double pumper took the place of that idea!!

rebuild mine, thanks, to your video. i had some issues with my tbi when i put a v8 350 5.7L in my Astro van. found out that i had a bad ground and one of the injectors were bad. Thanks again for the great video.

@exbioman

5 жыл бұрын

Good job! Would be great if they still made the AWDs! I miss my Safari. It was a handful of trouble, but great AWD and interior. Wanna go camping?

@melindaortiz9741

2 жыл бұрын

How does it ride with a heavier front load

@imac7531

2 жыл бұрын

@@melindaortiz9741 with a stiffer front suspensions? rides like a V6.

Thank you now I’m more confident to rebuild mine.👍

I'm so gonna do this. I have a 92 454 and developed a nice stutter to the point it won't run. So....I'm going to replace the Coolant Sensore, Map Sensor and I was going to rebuild the Idle Air Control Valve until I watched this video. But....However... I'm now going to rebuild my TBI Fuel Injector Unit after watching your video 3 more times. Great video but just too much beer right now. You da Man!! Thank you...Rocket

just came across this vid, ordered the parts from summit, getting them tomorrow!

Good vid man, thanks! I got the kit and am on it today !

Great video! Gonna help me alot.

Thank you so much for making this video. It helped me so much, it was exactly what I needed to know.

Exlent job dear.. you'd is the best helpful video

Thanks for the video! Got a 88 chevy pickup with a 350 and installed a jet performance fuel pressure regulator similar to the one you installed. My question is after installing it there is no way to test the pressure to the injectors. The gauge you talk about is before the regulator... Does this give you the right pressure readings or just the pressure from the fuel pump?? Thanks!!

hi good nights i have a G20 GMC van, with 5,0L v8, and the comsuption gas is high! i rebuilt the TBI with gaskets and is the same. the fuel pressure regulator can be fail? or the return gasoline can be covered? the ECT sensor is working fine, no "service soon engine" lights, and the O2 sensor is woring fine, the maf and the other sensors too. how can be the problem, thank´s

Put a new kit in mine today, but I had to fight those injectors out & in! 93 GMC 350ci 1500 would NOT idle at all~ but this solved my problem... Just need to reset (initial timing) on the new dizzy, and I'm back on the road.

Hello,i was just lookin at your video getting tips on the trottle body cleaning etc etc,now i have a 89 trottle body that was on a 305 that i put on a 350 10 yrs ago,history is that since i put a new 350 in it,i only drove it 10,000 miles...sooo i was just wondering if that idling air control valve,if faulty,could it make it use more gas when idling than when even moving around,that seems to be the case,plus i wanna get that kit anyway so i am looking into it,i did not hear anything in the video or anywhere on that idling air valve,if it is,any comments thanks and get back

Thanks so much for this video!!!

Great information thanks for sharing

He's not even here anymore... But damn this dude is legit. He had a talent.

Awesome video. Quick question. Is there any way to mess up the orange regulator piece when installing? Mines is leaking from somewhere in the rear. Not sure if I somehow installed it slanted

Great video ☺️👌👍☺️

The injector pod spacer you were referring to is also sold on Jegs for much less money than CFM tech. It's plastic, not billet....I have had one for a couple of years and it could probably even be made of wood lol billet is unnecessary. Also I took a carbide bit to that "lip" they have going around the top of each barrel....no regrets!

where did you get the adjustable fuel pressure regulator screw from? any benefits?

Have you ever removed the armature the linkage connects to at the end of the shaft? I need to remove one from a stock unit to put onto a Holley TBI unit that has a different armature?

Good video man!

Can you adjust the idle screw? I noticed when I turn mine the tip of the screw that touches the throttle doesn't actually move.. Not sure if its made that way so you don't screw up the idle or if the screw is actually broken.

Would rebuilding/replacing (with aftermarket) give more fuel economy?

Can you possibly make a parts list; or set of part links? including the company name, and or part numbers links in the description? I need to rebuild my carb soon, I have a high idle problem, and I'm pretty sure it's the gasket under the throttle body; but I'd also like to rebuild it with upgraded parts. BTW your video was awesome! thanks for the help!

thank you for the info my 350 runs with a pre boast of either looking for the fix

@catdakman1273

4 жыл бұрын

ignition module in distributor fixed my "no prime" problem.

i replaced a fuel injector on my 95 gmc k2500 it wouldn't start and made a loud clunk and nothing more looks like the o ring broke and it leaked alot. it ran fine before no issues but a missfire i was told by mechanic was whyi replaced it. Any ideas why all i would get a loud clunk when turning key?

A test light can overload the ecu, but I have used one before. I'm not sure, but there is a good possibility that the injectors are constant hot, and the ECU grounds the circuit to fire them, so test from the ground to the hot on the battery, or just get a noid night set to be safe.

The fuel pressure regulator is already adjustable, just grab the external diaphragm post with a pair of vise grips and crank it back and forth a turn each way to free it up.

No, base idle is through the throttle plates, there Is an idle adjustment on the drivers side. The IAC bumps the truck over base idle for cold start, abs when the ac compressor is engaged

Good vídeo. Very clear. Is it the same for 1995 C1500 4.3?

I have a rattling sound that comes from fuel injectors while running and when engine is off but key is on position

Great video. What are some good vendors for injector replacement? Other than oem is there a company that sells quality tbi injectors?

I wish there were more videos like yours. No nonsense, just "here's this part, here's that part, here's where the bolts come out, here's where the lines come in, this is what this part does, etc." Too many videos start out rambling about irrelevant stuff with shaky, unfocused videos, pointing through the engine compartment with greasy fingers. lmao, good on ya bud. Thanks for the video!

Haven't needed to useit for the injector screens, but if you hunt around in your toolbox for a CLEAN socket (or box-end) that fits over the end of the injector, you can use that to push the screen on with even pressure all around.

Can most of this rebuild be done with tbi on engine? I just want to inspect injectors, replace fuel screens, pressure diaphragm and any rubber parts that may be dry rotted, Astro van with 4.3 sat in field, replaced fuel pump, has low miles on rebuilt motor.

So do you put the backup rings on the pods or not ? I have 2 ,93 4.3L TBIs but they only had the o ring , I rebuilt one already and didn’t use the backup ring and a month later it has started to leak above the pod. Is that because I didn’t use the back up ring ? Every video I watch everyone seems to completely skip over that

I rebuilt a 91 TBI and the truck runs way better. BUT The noise of the injectors is WAY louder now. Did i do something wrong?

@24BLUEELMO

5 жыл бұрын

Probably because you sonic cleaned the injectors?

How do you measure your adjustable fuel pressure now??? The return line??

Buen trabajo amigo

hey great vid I just got a 93 gmc Yukon so this helps a lot good job

Hey bud question I have a mercruiser 5.0(305) engine same tbi throttle body and injectors etc difference is the bowl regulator has a tube as an over flow but that's essentially to tell you the Diaphragm is bad right there's not sppposed to be fuel getting under the Diaphragm where the set screw and spring sits right? I have a flooding issue with it that floods the engine severely through that tube

I've been trying to fix a 90 4.3 and it has spark and a rebuilt tbi and has lots of fuel. it isn't starting unless the pedals to the floor. any ideas why it's not starting properly and the idle is rough.

GOOD VIDEO MY BROTHER

Having trouble unscrewing fuel line from throttle body. The whole line want to twist and crimp rather than loosing?

hello buddy how much is tha fuel regulartor running you? I have try looking for one that looks like the one you put in and I cant seem to find one with the regulator screw nob

Where can i buy the fuel pressure regular and that fuel line fitting with the port to get fuel pressure?

Great video and thanks for taking the time to make it! I have a 92 sierra, same system and I replace the intake manifold for an tbi ederbrock intake manifold and an aluminum spacer under the tbi and ever since I haven't being able to make it run right. It stalls at full throttle, I guess my question is does it needs more more air,more fuel or both or maybe less of both. and can that be adjust? Thanks

@ChristianHelser999

7 жыл бұрын

israel cisneros im having the exact same problem. boggs at wot

Do you know what size bolts you used to connect it ?

Great video. I saw someone asked about the injectors orientation whe putting them back in. Isn't there a notch that needs to be lined up? One injector facing with notch facing forward and one facing backward.

I have a 1991 Silverado with 350/5.7 tbi fuel injector. One injector on the left side. Left side standing in front of the truck is spaying a what i think is more that a mist and also i can see like bubbles dropping as its spraying and black smoke comes out the drivers side/right side tailpipe / truck has sidepipes under the doors. I was told the left injector works the right side exhaust and the right works the left side exhaust. Is that right? Mine is left injector poss. over spraying with black some out the right sidepipe/muffler. Muffler tip is black on right /driver side only. I put new plugs,wires,cap,rotor,breather,bank 1 02 sensor. Had 1 right side back plug was coroated bad. I also tried a new coolant temp sensor. No change. Is there anything i can do to fix this injector? Also will it hurt or help to soak a old injector in transmission fluid?

YES!YES!YES! THANK YOU!!!!

Do you have to depressure the fuel lines just to change the injectors

I did every step you mentioned now the truck ticks when I'm driving. Some say the new regulator is bad, some say the injectors are bad and others say bad lifters. No issues before. What do you guys think?

What people don’t know is that most stock regulators are adjustable👌🏻. Just take some channel lock pliers on the round piece sticking out from it and watch the tab in the side of the regulator move up and down to change pressure

@Gabriel.4190

5 жыл бұрын

Are you being sarcastic?

Good to know, only thing I know on the truck is a throttle body spacer mod. I'm trying to troubleshoot my truck running lean causing it to stall. So hopefully taking the TBI apart would lead me to the cause

1996 v8 fuel injected by rail how much pressure does a real need to put gas to the injector come from the fuel tank

in response to sticky throttle, throttle shaft holes in body casting on mine wore out. open throttle, grab shaft & wiggle back & forth at every 90°. any play & the body is wore out. my machinist line boared it over size & made bushings for it from harley valve guides. works better than new now.

What to do if the pipe broke when I tryed to bend it where the screw goses

Anybody know torque specs for the torx screws? I have looked online and my haynes manual with no results.... Someone told me 12 ft lbs, but that seems pretty tight for those little crews lol

Good Job!! Thanks!

hey i have a question for u i have the same set up but when i try aDJUST IT MY GUAGE IS STILL REAding 10 psi it wont go no higher i trying to get it to to 14 psi

where did you get the rebuild kit from that included the diaphram?

At 6:14 next to the spring is a crown looking washer where does that go.

That thumb screw is what size? 10/32 x 3" ?

Very nice video. Wish I had watched it before rebuilding mine. After rebuild, when key is turned on, the TB bowl fills up on top of the throttle plate then the gas leaks down into the manifold. Also, the throttle shaft is leaking onto the manifold at each end of the shaft. When I reassembled the TB, I noticed that the Air valve plunger did not have any play in it, in or out. Can I put new seals on the throttle shaft? Could I have replaced the fuel pressure regulator backwards?

which way do the injectors get clocked?

Thank you.

Good video. Where'd you get this kit?

Is there a performance chip you can get for these units, can they be tuned for fuel economy over horsepower because for some reason I would love to see what level efficiency they are capable of.