We watched all the way. And we did so because you kept all the issues you had and never edited what didn't work. Good for you! Me and my son felt like we were standing right be side you. Thanks Brian. We'll be with you all the way on the rest :).

Thank you so much for that Information ......months of overIdling problems fixed in 3 minutes you sir a bloody legend thanks again from Melbourne Australia

Fast idle thermo valve under throttle body needs cleaning ?IAC valve needs cleaning? sensor to power steering pressure valve wire detached, Pcm compensating?air bubbles in coolant? Prayer beads next on the list😇.

Thank you man, your video helped me out with trynna figure out my idle surge, it’s been almost 2 weeks of me ripping through my engine bay looking for my issue witch ended up being the map sensor 🤦‍♂️ I went through absolutely everything and never thought to try the map sensor. Again thank you so much for helping me out man

Thank you for the knowledge. Started to go buy an alternator. Thankfully you and the greatness of KZread has done me a good solid once again.

Thank you so much, my neighbor's 93 accord had cold engine surging, the first fix (tightening down the diaphragm) fixed it. I just tightened it (about 1 3/4 turns) than backed it off an 1/8 turn and instant problem solved. Thanks man!

@carlosandresh__

Жыл бұрын

Same thing here. Idk if unplugging the map sensor has to do with anything bc when I did this that’s when my problems came.. tighted the fast idle valve all the way and loosed about 3/8 of a turn and no more surging

Hey Brian, from New Jersey. I’m having same issue with my Honda. We changed everything trying to narrow it down. Found out the throttle body is no good, needs changing. Yours just may need cleaning. Good luck! Ha these great dreaded fixes on the Hondas.

Displays New York. 2 things with this Honda, I had same issue with idle surging and running high, I found it to be an adjustment on the passenger side of the motor I think on the intake area was a brass flat head screw that stopped the problem. The screw head faced the passenger side fender. The second thing is many times I find a vacuum leak in an odd spot by using a propane torch unlit, and just poke around areas with the propane hissing out of the tip and if you get near a leak the idle will jump up because the motor sucks up and burns the propane through the leak

I HAD this issue recently on my 99 civic ex. (Beater whip). High idle/ surging idle, it went from 1,000rpm -2,000rpm plus. It Drove my crazy for a few days- replaced iacv from amzn. Didnt resolve the surging idle. Cleaned out iacv unit & replaced it. Same problem. Cleaned throttle body, map sensor, tried numerous suggestions, nothing worked. I sprayed some carb cleaner on every intake hose- nothing. I was so ready to give up- then I sprayed the outside of the throttle body withcleaner- the rpms settled for a second - then started surging again. I sprayed the hell out of the outside of the throttle body- especially the side towards the firewall. The idle settled! Purchased new throttle body gasket and installed it. Problem solved!!!!!!! Great video though pal.

I have the same problem on my acura tl 98. I have tried everything you did, except the smoke test. What fixed mine was taking off the tp sensor on the throttle body, cleaning it and new gasket. But I still have a running rich problem, blowing black smoke. I'm a girl learning to work on my own car, I don't trust mechanics anymore. Thanks for your video, it was great. Great job. Shellie

@deeznuts_808

Жыл бұрын

Aloha Shellie. I also am a girl (woman) trying to fix my own car. Having surge problems on my 2005 Accord. I got it down to a slight surge, I think I have a air leak somewhere..

@christinawest3820

6 ай бұрын

Same here, I finally found a thin crack right in the crease of the air intake hose. on a bright note, I’ve learned a lot, & cleaned like everything on my car LOL

@donxiong1775

4 ай бұрын

@@deeznuts_808any check engine lights?

Displate! - Maine! Learned so much from you as a starting off Mechanic, keep the wisdom coming, man!

I’ve had the same similar idle problem , I’ve drove my car through it for a year and it gets me from point A to point B like any other car , that being said I’m a happy owner .

Thank you for this video! I'm going to try and fix my engine problem.

Had this surging idle problem on an accord I've been working on for my sister. I swapped out all 3 valves on the intake manifold with no change. Did The block off plate thing and it didn't help BUT, what did was when I turned down the idle screw located on the front of the throttle body at the top left side. The screw had vibrated loose and had caused the idle to rise. There is an O ring on the screw that stops the screw from moving and the O ring was hard as a rock and didn't grip the walls anymore. I pulled the screw out and replaced the O ring and then put it back in about half way. I started the car and adjusted the idle down to where it should be. It now idles smooth and constant.

@eg7105

5 жыл бұрын

Rob you’re s savage that help me fix my h22 eg hatch it was driving me nuts for 3 weeks

@jesuscarmen.v6258

5 жыл бұрын

Which screw?,where Exactly is it?

@MikeKollin

5 жыл бұрын

Make video of where it's at! 😊

@Bigjamez2011

5 жыл бұрын

I'm 100 percent sure this is the problem with that Accord too . I had the same luck as this a cord turned out as well to be the screw. Nice find and thanks for posting .

@bebejesisoto

4 жыл бұрын

Rob M where is this located exactly having this idle vibrating problem as well. Thanks

Displate California, I really appreciate these kind of videos. I personally have a 1990 Laurel blue coup and luckily haven't ran into this problem/nightmare, but if I do I got this for diagnosing

Thank you so much. This very vid fixed my issue. I sent a mechanic, so I don't know what I've done, but, it worked beautiful.

worked on a 99 Chevy venture, 3.4 same idle problem, someone mounted egr valve backwords

Just an FYI on the Honda MAP sensors. It is normal to see around 2.8 volts with the KOEO or WOT. It surprised me the first time too. I wanted to see the normal 4 to 4.5 volts. It seems Honda designs these MAP sensors to work on NA and Turbo engines. I'm not sure I've seen one like yours at 2.5v, so it still could be an issue. The hole you plugged up in the throttle body to make the idle come down. This passage goes to the electronic IAC valve right? If so, what this means, is the computer is commanding this high idle speed. So we definitely want to look toward an input problem like you are. If you unplug the electrical IAC connector, does it also idle down? It should, if my suspicions are correct. I've seen the TPS and ECT cause this issue on these too. This creates a condition where the ECM commands the IAC to open, then the ECM program fights with itself and cuts injector pulse, causing the surge. I think I am rambling now. Sorry.

@briansmobile1

7 жыл бұрын

No problem at all. When you talk, I listen. The ECT has battery voltage instead of the 5v reference I would like to see there. The IAC is new. I threw a used MAF in it and it's better, but still lopes- just not as hard. The idle signal voltage is a lot lower. Unpluggin the IAC does cause it to idle down. Unplugging the new MAF also makes it calm right down too.

@changingtimes37766

5 жыл бұрын

Watch my video. kzread.info/dash/bejne/aXZ1ztZ7YLzahpc.html

@miltonmendoza1462

5 жыл бұрын

I had to adjust tps and throttle cable acts like a dead spot on tps. Also off subject

@Stickly94

2 жыл бұрын

NOOO, ramble moooreeee, plzzz.You're saving my buttttt. Gonna be running these test's tomorrow ! Thank you both !

Displate North Carolina Hey man good video. I have a similar problem on my 97 Toyota 4Runner. No change in RPMs just an intermittent surge at idle. I'm still in the process of diagnosis myself. Good luck to both of us!

Brian, your so calm, your tone never changes when workin on something that's kicking your ass.. stupid idle. lol. I'm just "DISPLATE" In Up Sate NY. !!

@briansmobile1

7 жыл бұрын

I've been doing this over 30 years. In my teens & into my 20's I used to tantrum and throw sockets at the ground. Then I'd have to calm down for like an hour before I could think again. It's faster to just chill.

Hi Brian, great job! It really helped me eliminate all the digging on a similar problem on a 1991 accord!!!

@Stickly94

2 жыл бұрын

what was your issue ??

My 89 civic did the same thing. Found the coolant temp sensor had one wire was broken. Fixed wire now the car runs and idles good.

code 43 will set when a lean/rich condition is present, that hole you plugged off goes tot he IAC or the idle air bypass adjustment.

This is just awesome! My mechanic kept my 2000 CRV for a month - could not fix the idle surging. He wants me to take it to a master mechanic. I'm gonna ask them both to watch this and read all these comments. You all are AMAZING!

Awesome video as always! Keep 'em coming. Displate Pennsylvania.

Hi Brian love ur videos just want to ask, I got a 1990 civic hatchback and it dies when I stop on a stop sign just want to know what can I do or check to fix the problem. It was running fine until I changed my air filter.

Is the A/C on by chance? My 90 Miata does that with the A/C on, compressor is locked up, and it idle hunts just like that. It is trying to adjust for the extra load but there is none.

Had this same issue on a 90 civic si, despite all my efforts I ended up turning the idle screw down to 700rpm, fixed the issue and never had any bs after... Also had this same issue on a buell xb12s, turned the idle back down a lil bit and surging quit for good.

Normally, I think a hunting idle is the computer gaining and losing control of the idle. I would pinch the vacuum hoses to see if it brings the idle down. I think that unplugging the MAP sensor, normally, just allows the computer to run off of predetermined values. However, having a MAP that's not designed for your car is a no-no...

My Acura Integra it was a few small hoses located behind the PGM-FI intake. It was hard to get to because there were between the firewall and the intake that didn't leave much room to service unless I removed it. It did it without removing it and once I did it worked fine. The hoses become brittle over time and leak and in some cases engine coolant might come leak.

Hey Brian your video's my go to after "Eric the car guy" we are all still learning. Displate from idaho

Displate - Tennessee, Great work. lots of good insight on proper diagnosis in your videos, especially this one. Humble Mechanic is great as well.

@briansmobile1

7 жыл бұрын

Your comment makes me happy Josh, I can tell you're paying attention.

Had this happen on my 95 Integra GS-R and that's exactly what I did. Took the FITV out, took out the innards, sprayed some brake cleaner on it and wiped, and threw it back together. With mine, it idled around 3000rpm and once warmed up, would hunt to lower engine speed and back up.

GREAT persistence.Awesome mechanic.

“Displate” - Texas. Great video man, thank you for posting and setting up this giveaway! Keep the great videos coming!

my 02 accord v6 j30a1 does the same thing. it was a combo of the idle air control valve and the egr valve and gasket.

I use choke clear and spray it down, see if the ideal changes. Also I seen throttle body get clogged from the vacuum system, ran like this one.

Displate - Utah! Great use of the disco smoke machine. I need to find me one of those.

Displate. Watching your awesome videos here in Arizona. ;) Thanks Brian.

I had a 2002 accord with surging at idle, does it when warm and hot. it had a code for idle system malfunction (forgot the #). Honda service manual said if you plugged that hole inside the throttle body, check the Idle air valve for fault. I'm not sure if this is the same case for you as you said it will go away during cold. and also it's different vehicle. I really hope you will find the problem, very excited to know what the problems are!

Like the videos and learn a lot. Displate seems nea, love the Abstract, Architecture and other catagories. Living in Iowa

This advice fixed my 93 Honda Accord idle up and down issues

@RetroEliteGaming

3 жыл бұрын

What was it ?

@RetroEliteGaming

3 жыл бұрын

Got a 92 having the same issue

On the 97 accord I have, the Idle air control is on the back of the air intake, like where the one in this video is, mines on the back and I can’t seem to see the fast idle valve, it should be around the same area this one is just on the back right?

Would no alternator belt (and thus engine seating and running on just battery) cause these symptoms? My '99 surges like this but the alternator belt is off (alternator seized)

Great video. You even preempted the safety Sallys

My del Sol will idle high when it's cold then when it warms up idles really low and almost stalls unless I give it gas. Lastly it runs rich, this didn't start happening till I replaced a cam cap.

" Displate " from Virginia. You've replaced click & clack. My father and grandfather taught me to fix it not replace it. Enjoy your program. Thank you. ~Mike

Patience of a Saint Brother !.. Impressive.. Thank you !. Wil. Kingston Ontario Canada

Very common for a bad coolant temp sensor to cause this problem also. The one for the ECM obviously, not the gauge.

had same issue on my 97 accord. Just bi chance found sparkplug lead had slight crack. Would only surge when idle. put new lead fixed!!.

Holysmokes brian you're on an ac pro commercial! (watched the whole thing) its like getting two brian videos in one. Btw did you ever figure out this issue?

i have the same type of car i had similar issue, mine were the cold idle valve you blocked and the o2 sensor i had to get a oem sensor for thing to idle smoothly. the thing you suggested is that when it goes in to closed loop when warm, it start to surge means that the closed loop system is suspect. i suggest you look into the o2 sensor since that what comes on when warm . also it could be that map sensor. could get 1 a junk yard or ebay. best of luck to ya

great work man love the channel

Good info thanks!

Than you for all your videos Brian....but you did not say what caused this idle problem. I still have a 1988 Honda Accord,and I had the same problem.And it was a Leake Intake manifold gasket. Star car and spray carburetor Cleaner around the manifold And yes it would change r.p.m. Put a new gasket,and that Solved the idle problem. Let us know what caused this Problem on this car. Best regards.from Arizona.

Displate - that is cool... Moved to California by the way, I don't know why but it seemed like every car I got in the short time i was doing Dilly's Mobile was like this Honda. In fact I had one just like that but it was older.. 87 I think.

My Honda did the same thing, I happen to have a spare engine in the garage and replaced the IACV (Idle Air Control Valve) and it fixed my problem. Displate, Oregon. I noticed someone also mentions the IACV and to clean it, I'll mention that I tried cleaning it first with no success, replacing it is what fixed it.

I can remember blowing out some small coolant lines that feed the IAC for this issue back in the day.

I had same problem on same car and the problem wasn't obvious at first look but there is a bracket that helps hold the intake manifold and on mine was missing which caused hair line crack in underside of manifold.You couldn't see the crack but once fitted with new manifold everything worked as it should.

I have a question about doing the diagnostic when I put the paper clip in the little blue box my engine light stays on is that a code

Commendable patience I like this guy

Hello. i have exactly the same problem, but sometimes when i turn on my headlights then the problems is gone until i turn them again off. can you help?

you might try to , use the pcm idle re-learn sequence, listed in the Haynes manual for that year of Honda, the sequence is kinda long , but maybe this will stop the surging !

Need help when am driving wanna stall out or cut out and have poor acceleration what would the fix be would it be iacv 91 Honda Accord ex

i know you have a lot on your plate man I just wanted to ask. I just swapped a jdm b20b high comp in a 99 integra. When i started it the idle is surging 2k-3k up and down and i swapped over my b18b1 crank pulley and belts and the alternator belt fits but im having an issue with the ac and ps belt.

Had a Hondoo doing this exact same thing, the fault was a stuck open IAC causing an intake air leak.

Displate contest. Chris from Maryland. Thanks Brian for all the entertainment! Would love to bring my 03 f350 out and have you do the transmission rebuild if you are interested.

On my 93 Honda Accord, it was the air boost valve that was making my engine idle go up and down until the engine had completely warmed up, and you just can't disconnect it or plug up the port holes, it has to be on there and work properly, it turned out to be a small tear on the diaphragm inside the boost valve.

Hey Brian. Thanks for the mention!

@briansmobile1

7 жыл бұрын

Welcome man, thanks for the lessons!

clean the idle air control valve (IACV) on the back of the intake manifold. i always cleaned mine with brake cleaner and let dry for 6 hrs

@MrJeffpeck

7 жыл бұрын

I think Jay is correct. I've had this exact problem on an old honda and fixed it like Jay describes above.

@jrmym2

7 жыл бұрын

The IAC is on the font of the manifold on a '90 Accord.

@lothianmcadam1

6 жыл бұрын

The IACV is on the bottom of the throttle body on a '00 Accord J30A1 3.0 V6.

@stevenmotchan2048

5 жыл бұрын

At 11:15 he points out that he replaced the IACV.

i traced my idle surge to a faulty intake manifold gasket. runs sweet as now.

Displate Florida Thanks for all the great vids!

"Displate" Texas. looking forward to hearing the solution to this Honda

My previous problem like that...try it tightness FITV half of thread..or adjust thightness in until rpm sound normal..frm Malaysian

just replaced a 2002 accord 4cyl radiator and had the idle surging while having a low coolant temp and fans not coming on. Owner never had the problem until now. hope to see the fix.

Great video! Also, you could go with "B-Mobb iz in da house" like those awesome VW "Unpimp ze auto" advertisements featuring Peter Stormaire.

@briansmobile1

7 жыл бұрын

I LOVE THOSE COMMERCIALS! Dang near everything reminds me of them.

Stellar video/explanation.

This is what am going through right now. 2000 Acura TL. The car is in the shop for other work and it had this issue as well now the shop can’t seem to fix it. Is the car a done deal ??

Displate, Wisconsin. Brian, hope you get this thing figured out! I am rooting for you man.

@briansmobile1

7 жыл бұрын

Thanks Ryan!

hi i have problem in honda civic 94 some time morning didnt work if work the engine slow down and up like breathing after 1 minute its ok some time wen i drive the car and stop try to turn again wil not start have to wait like 5 minutes or more

Just curious have tried another Ecu ? Early 90's electronics , bad caps eating through boards not uncommon.

had the same problem with a 93 accord, replaced the iac after I got tired of cleaning it with brake cleaner a couple of times a week. that didn't work either, ended up just blocking it with a thin cardboard homemade gasket.

Beautiful scenery!!!

Displate Indiana - WOW! What a great idea using a party smoke machine to find vacuum leaks. I don't have a smoke machine, but I have a couple friends that vape.

Where is the fast idle thermo valve (FITV) on a 1997 Honda Accord located?

If you wonder why the vacuum leak down stops at high vacuum, at 10:57 you can see the test hose pinch near its connected to the hand vacuum pump. Could that be the reason?

My '96 did this, and I needed to use the bleed screw (12mm, near thermostat). Once air was bled, idle was fine.

Also have you started from the top, fuel pressure check? What is that doing, you could have a pump or pressure regulator not keeping up.

@briansmobile1

7 жыл бұрын

That is right thinking.

@Sicktrickintuner

7 жыл бұрын

briansmobile1 not a problem, hopefully it leads you in the right direction to fixing it. Other then that, my only thought after is electrical, like bad wiring to your Idle air control motor, from broken wires, tps sensor gone bad.

Displate in Iowa! keep up the amazing videos :)

Cool video man thats got my mind going for sire not sure what that issue is though Displate

Displate Wisconsin, GL with this Honda man I feel ya on it.

Displate from New York. Man its beautiful where you live!!!

What kind of silicone did you put in it?

Did you check or switch the Main Relay! I have a 2000 Honda CRV and I have the issue where when the car is cold it starts with no problem but once it warms up and has been running for a wile and turn it off after 5 to 10 minutes later it won't turn on, until it cools off again then it would turn on with not problem. after a bit of research on google (LOL) it seem that the most common place to find the cause is the 'Main Relay' I will be taking my car to the shop tomorrow for them to replace it and pray to God it was the only issue, but now i'm also having the idle problem but it comes once in a wile no so bad for now, but i'm trying to find it so I can neap it before it becomes a big issue! Please update us with anything you find, it helping us all out. Thank you and continue the good work.

Hello Brian ,I have a 98 Civic DX with a D16y7 engine , It seems to sputter intermittently between 2nd and 3rd gear I have replaced spark plugs, fuel pump , cap and rotor any Idea what to check next? Thanks again !

@briansmobile1

2 жыл бұрын

Could be a worn out torque converter or clutches if it's an automatic and is "fish-biting."

I have a 91 Accord that surges..why? The idle air control valve vibrates loose and I periodically have to tighten it to the correct idle.

Displate Georgia. Keep up the GREAT WORK!!!

Displate Illinois. I like your BFATE when you are flying. You just become a drone. If you get a chance and if you can could you explain what does it take to fly like you as goes with equipment, training and money? It must be fun up there. Utah has a plenty of space to do that. Have a great day.

“Displate” Washington St Good Video Brian I have a 1991 Accord EX with 132 K Its been a Pampered car Still looks new I get lots of Complements on it. I think it drives nicer than the newer Accords. Thanks for all your great Vid's

I am suffering from the same conditions on my 1993 honda Accord EX I have replaced everything I could think of incuding a map sensor that cost me $300 yet I am still dealing with idle surges. If there are any suggestions on what I can do to remove the idle surges please tell me.

@diezelvh4133

2 жыл бұрын

Try idle control reset. Change intake manifold and throttle body gaskets.