diy honda acura idle surge fix high idle (not idle controll valve)

[@kaosaepharn4326]

That pos fast idle threw p0505 which is idle air control malfunction. So like many or some of you I went and bought a China iacv off of Amazon. Replaced it and it idled even worst. Put the original back on and it idled slightly better than with the new one. Idle still surged from 11-1400 rpm. No vacuum leaks and coolant is bled. So finally came across an article on how to diagnose if the fast idle valve is bad. You basically remove intake tube and inside the throttle body there is a hole up top for the iacv and bottom hole for the fast idle valve. When the car is cold out your finger over the lower hole, you should feel suction. When the car is warmed up there should no longer be any suction from that lower hole. If your car is still surging, put your finger over the lower hole again. If the idle stops surging and goes back to normal then the fast idle valve is stuck open, allowing air into the intake even when it’s warmed up causing the surge. Removed the valve and you guessed it, the oring was loose. I just tighten it. Didn’t clean it or anything. Put it back and the idle was perfect. No more CEL.

[@psalm2forliberty577]

Kao, great result fixing your high idle issue. Does this "Fast Idle Valve" plague the V-6 Accord or just 4 cylinder ones ? Your nice write up / comment didn't specify. All the best - David

[@NinjaBubblez01]

tried this but now the infamous idle jump is back after fixing itself for a little

[@enjoythylifers]

Man ur a boss i had my accord coupe in my friends house 4 six months we cleaned the IACV, changed the map sensor, purged the coolant. Damn i am so happy. So props to you my man. Love from Spain!

[@empirestateconstructionllc2336]

Hi many years later .. my mom passed 3 years ago and we have her 92 integra Ls ... and its done this for years .gonna try ur fix with my mechanic buddy today .fingers crossed but thankyou in advance !! Frank

[@davidgriffin8674]

Well, I had already scratched all the hair off of my head trying to figure out why I kept going 40 mph in my Acura tl without giving it any gas. Well my hair can grow back now thanks to you! Thank you a bunch!

[@cornbread-8396]

Your video saved me alot of money man, it worked 100% . The plastic piece was backed almost completely off.

[@GearheadsAutofab]

Glad to help !

[@ironworker5792]

Thank you brother. Solves an issue that bugged me, owe you a beer!

[@enjoythylifers]

I owe him a 12 pack hahaha of leffe or some belgian brew

[@youandiryan]

Just so people are aware if they come by. This only works on older Hondas/Acuras. Anything 2003 and up does not have a fast idle valve. As anything newer than 2003 is fly by wire and sensors, and controled by the computer. But decent video thank you!

[@anona5776]

I was a Ford person now I’m turned Honda I had a 1995 civic and sold it and regretted it and now bought a 1990 integra with the b18b1 in it with some issues and some freinkenstein stuff this video helped one issue.

[@meh6953]

Thank you for this video, I just purchased a 93 civic ex for my son, this is his first car.

[@GearheadsAutofab]

Glad it helped ......let me know if you have any other Honda questions 👌😁

[@Sedonalegendhelenfrye]

Wow, you rock, You're a great mechanic. My 01 Honda Civic EX (bought new) has developed an oscillation at idle (rev up & down) when cold, usually tapping the brake stops it (idle completely normal when engine at operating temp). Either way, I've rebuilt 2 engines in the past, a 401 Riviera, and a 350 Skylark so know a little about engines, but this Honda is such a mystery to me and I'm at a loss to figure out this issue. I was very impressed with your tutorial and will definitely start with your approach. If you ever move to Santa Fe, I would definitely let you service my vehicles! Best!

[@franciscodeyavorsky1622]

Excellent tip! It solved the idling problem on my Civic 93! Did realized the reason the plastic cap losens out.... the O-ring of the plastic cap, next to the thread, with time hardens up (looses friction with aluminum body) and with engine vibration allows to unscrew eventually again. Replace with a NEW O-ring!

[@GearheadsAutofab]

Good tip! I usually put a touch of loc tite on it to stop it from backing out.

[@_brushie]

Pro tip, use something plastic and flat to turn the FIFV so you remove the chance of chipping it. Less stress trying to be super delicate with it when you turn as a metal screw driver can really mess it up with no effort.

[@kylerobison1425]

If you buy an old Honda, I just did just change your IAC valve, your fast idle valve and your EGR valve. A couple other parts should be changed as well too. 30 years old Just change them.

[@benjaminmarrero315]

😮wow brother fix my headache appreciated thanks God bless you bro 😊

[@56ackbar]

Hi thanks for the video it will be a big help one thing I would suggest though is to not use Loctite on plastic I did one time and the Loctite destroyed the plastic I believe there is a special Loctite just for plastic thanks again

[@GearheadsAutofab]

Good insight, just any thing that helps it not back out 😊👌

[@tigreeloc3559]

Hey man thanks it fixed my idle on my b20 90 integra

[@GearheadsAutofab]

Sweet !! Glad it helped

[@kentowakai1234]

Gonna feed the algorithm to get you more eyes. Thanks for your help.

[@hamiltonshomelites4489]

Mine was totally backed off and just bouncing around in there issue fixed now thanks man I subbed!

[@Fable1Guides]

yeeee

[@MensaCramps]

I would suggest inspecting the O rings as well. One of mine was plasticized and two others were frayed. You can roll the dice on parts from a junkyard, but best of luck getting the large O ring that sits on top of the "air side" (the first end that he opens in the video). In the end, I replaced my frayed O rings with ones from a junkyard and had to order the large round one from a Honda dealership.

[@angelnewell7562]

I'm gonna try this, My 96 integra aggressively rev's from like 1-2,500k any time I start it till it warms up, Have been trying all kinds of stuff

[@juliocadiz1643]

Thanks man, took it off cleaned it re tighten it and it’s running normal again! Now for some reason whenever I stop giving it gas it acts as if it’s going to stall but then goes back to normal.

[@texasnhis49bitches49]

did you fix it?

[@olivermoes-okun2468]

did u fix it?

[@jesuspena5366]

Does the other side of that piece you took off have other gaskets that need to be replaced as well , the other side not the plunger side like O rings

[@andre_delsol7358]

Finally I fixed my idle, thanks so much man!

[@mlinecomposites1]

I’m in a 98 integra GSR with a 98 type r swap. I have issues when driving at 70mph. Without my foot on the gas at that speed it will hiccup/ spudder and then hi idle sometimes at a red light. My question is does my year have that fast idle valve as well? I’m not a tech and it seems that some techs I’ve went to don’t know either, just curious

[@loganward7800]

Thanks man! My car was idling at 3500 and this fix it!

[@Truthguy73]

Thanks for the quick lesson. Im gonna do it tomorrow on my CRV! chill intro and outro music too!

[@GearheadsAutofab]

Hope it helps 😁

[@invain143]

What is the name of that valve ?

[@Truthguy73]

@@invain143 Are you talking about the Fast idle control valve or the idle air control valve? Those are the two I know about.

[@CanadianBoardCrew]

Truthguy73 what year is your CR-V and did this fix work?

[@chriscadman5715]

Nice work! Do you have a fix for a 2004 Accord 2.4L 4 cyl doing the same thing?

[@devin5473]

my 99 integra gsr doesn’t have this…. i think newer generation don’t have one

[@CharlesBirdm]

My 90 Accord has the surging problem but only from a cold start and only lasts 2 mins then back to approx 700-800 RPM, is this like your problem or was it always surging regardless of engine temp (meaning would happen not just at cold start)?

[@ezye4567]

Hi men I cleaned my throttle body and map sensor on 2009 mdx after that check engine light comes on and the rpm bounce at the end when I press the brake pedal also the rpm jump up and down when I release the gas pedal. I relearned the tps by scanner and did the idle procedure but still the problem is not solved. Any advice please and thank you

[@milscervantes726]

If my EVAP on top of my intake manifold doesn't fix my 5k rpm, then I know this will. Thank you 💯

[@elijahslemp1768]

Just got a honda on trade that was surging the rpms thank u so much bro

[@mprism7985]

lol same here bro, got a lude in a trade and it bounces alot

[@elijahslemp1768]

@@mprism7985 makes since my 98 ek coupe was insanely fun after the annoying idle surge was gone but have had 2 vehicles since than and now have a bad ass truck all.anojt the hustle.

[@momo-yz4lu]

My civic fluctuating right now will try to see if it works. Thanks

[@dano1717]

Wait that little plunger thing that has a spring is not supposed to come out? Because I did this and both the plunger thing and white plastic with slits came out

[@bloodout666]

I will check this out first on my 1998 Honda Odyssey idles up and down when stopping at a red light and has stalled many times as well

[@OGbqze]

My 1992 honda accord idles around 650-700 rpm, but it almost dies when I put it in drive or reverse. Thoughts? I already cleaned iacv and adjust this fast iacv

[@abtransport13]

Any updates? Did you fix it? Have the same issue on my 91, I’m planning to replace iacv this weekend

[@MrTottanham]

your transmission is going out

[@dopegenteticsgaming1567]

Where can I find that lock right stuff at? Great video, I made the mistake and bought a new IAC. But hey the new one is installed 👍🏽

[@louievasquez2197]

Once removed can this be cleaned out with brake cleaner before re assembly?

[@joeplayz2550]

My b20 swap eg is having an issue. When it’s cold and go to start it, you have to crank it and then it will catch fuel and start up. Starter sounds good. It’s also idling at 1k-1100. Is that normal? I fixed an air leak and it dropped to 800 but now it’s back to 1k

[@VictorRodriguez-nq9xc]

Ihave a 96 ITR & it has a rpm surge… the surge would be from 1000- 1500 rpm I changed the iacv & now it idles pretty high 2500 & it surges up n down higher now… idont have that fitv on my engine what can the issue be?

[@pukhtoonzNYC]

I have a 2017 Honda Accord and my car idle up to 2 going up and down when parked. What you think is the issue ?

[@latentef3352]

Thanks this helped alot it took me 3 months to figure this out 👍👍👍

[@stickeminastew]

Hey man. I have a 98 Honda Civic. I notice it idles fine but when it gets hot it idles super high. Today it was around 100 degrees, and I was having a hard time even stopping the car because the idle was so high. Im curious if you think this is an area I should try first?

[@GearheadsAutofab]

Yes, try this first because it moves the amount of air that bypasses the throttle body based on a thermostatic switch.

[@seventhladderautosport]

I have a 93 civic dx 1.5 and I’m having bounce between 1k-1.5krpms. It only does this when the car is at temp. And fans kick on. I’ve done the thermal valve. I’ve done the IACV I’ve checked leaks, tps, bled coolant for at least 3 fans cycles I’m running skunk2 intake with oem purge, throttle,

[@GearheadsAutofab]

I have a 93 Del Sol right now same problem, and It got better when I verified cAm timing it was off 6 deg. Also maybe try getting the idle down to like 700......you got a hard one .....good luck!

[@copywrks1]

Where is that part on a 2004 CR-V? Mine has fluctuating rpms and I just cleaned the idle control valve

[@elbbqsr1450]

Thanks man i just swamped a bseries into my civic and thought it was so weird it surge idle to 3and 4k rpm

[@midnightg3593]

Did this fix work?

[@elbbqsr1450]

​@@midnightg3593 it did. I replaced the sensors in my friends car. as well as high idle valve and no issues yet several years later

[@meme9803]

Only video that is for solving that issue

[@tsirkucp]

93 del bro. 2700 rpm on start up til warm. this may be it?? if not any suggestions thanks

[@GearheadsAutofab]

Could be part of it, but you probably either have an exhaust leak or some other way that areas getting into the intake manifold cause that is a very high idle.

[@tonyyykk5153]

I got a 96 civic dx with a swapped motor (b16a2) my idle surges at 4k I’ve tighten it but it just keeps surging really high. I’ve clean iac, I also adjusted the screw on the top also but no change. I would try using the lock right but if I have to go back and take it I don’t want to break the plastic bc I can’t find the thermovalve anywhere. Please help

[@GearheadsAutofab]

The only way a motor can surge is with air coming in, you probably have a big intake manifold leak. They spraying break cleaner on any possible leak areas. Common leaks are found on vacuum ports, or throttle body gasket and interior o rings, I’ve even seen the break booster leak. Just check everything

[@SarntRexxo]

So I have a 94 Del Sol si (d16y8 sohc) should I still tighten it down as much as shown? Or above that?

[@False_Death]

Wait you said this valve is coolant controlled? I ask because while doing a job on my b18b1 i nicked a coolant hose that was attached to the intake somewhere so i ended up substituting that hose with one i think might be a bit bigger then what was on it. Would thay cause this valve to go haywire as well and cause high idle?

[@GearheadsAutofab]

Yes there’s like a thermostat in there that closes off the air way as it gets hot. But changing the hose size will mot effect it. But if there’s any air in your system it tends to get trapped in those lines and can cause idle surge .

[@False_Death]

​@@GearheadsAutofabthanks a lot for responding dude. That would make sense as the job I did was a head gasket so I had to take a lot of things apart. So you think air could of gotten into the system when I had all the lines and radiator take. Off? It's a weird idle issue that I've never seen before. On first start up it idles very high but as I drive it, it's fine until I switch into neutral to stop and then it goes back up into a high rpm and once I come to a complete stop the idle will drop to normal speed. Then sometimes (not every time) after driving for a while and I come to a complete stop my idle will drop drastically to like 500rpm and sometimes it will even stall out. And when I turn on my AC it keeps the idle up to a simi normal level. It's the weirdest idle problem I have ever seen.

[@nalanibringas]

What about a 2011 Accord 4CYL? Dude I’m going crazy trying to figure out how to resolve my high idle. RPMs are acting crazy. Idle is around 1500. I sightly cleaned the throttle body, but nobody can verify if I have an IACV or EACV in the 8th Gen accord A/T. I looked around my TB but didn’t want to fully remove cuz I do not know how to do the Idle relearn procedure nor do I have an HDS to reset. Help 😅

[@BryanGallo510]

If I cleaned it and it still surges should I replace it?

[@juju-onna-beat462]

Hi I have a question I have a 98 Honda Civic DX and I got it smogged and it passed after my smog it started idling high. It only idles high when in park as soon as you put it in drive it sounds better I don’t have an rpm gauge on my model car thanks in advance.

[@davidwarner5256]

Would that cause a miss got a 94 Integra just stated to miss 2 days ago only does it mid pedal if I floor it. It won't do it did a full tune up and completely new dist. No codes but check lite comes on while driven. Has the 1.8 nonVTEC

[@GearheadsAutofab]

Well, mid petal miss might be a area in the tune, could just be as simple as a tps calibration. But if it just started doing it and it didn’t do it when you got it tuned originally, then I would say one of your sensors is giving the ECU different information, Could be a failed sensor

[@davidwarner5256]

@@GearheadsAutofab it started doing it then I did the tuneup. The dist. I got 4 months ago new from car quest. I'm thinking tps has a dead spot. But then I saw where if it gets over rev it could have messed up the dizzy. I noticed the cars rev limiter it don't work I hit 8000 and it wanted to keep goin

[@xstr8fncodx]

Hey buddy thanks for the video! Just a quick question though... My idle is only high on cold starts where it idles around 2800 then will bounce until it reaches operating temperature. So would you suggest still doing this before I go to the IACV? If you could write back that would be awesome! Thanks

[@GearheadsAutofab]

Yes try this first, it’s almost never a bad idle control. High idle is normal cold but 2800 is more than normal.

[@daltondaniels890]

Does coolant come out when you remove this?

[@fincity1964]

awesome info. Thanks for making video!

[@jonathanruvalcaba7189]

Helped me solve my problem. Thanks man!!

[@3Beepz]

Just picked up a 97 integra, b18b1, no fitv , cleaned IAC, tb, and tps, was idling around 1300 before I cleaned tb, now it's at almost 2000. I'm lost and getting aggravated

[@GearheadsAutofab]

Sounds like you have a air leak in the manifold. Let it idle and spray break clean any where you think it might be leaking, if idle changes when you spray a area look closer at that spot for a leak. If this test didn’t reviel any leaks than make sure the throttle blade it self is not stuck open too far. There is also a idle set screw that may need to be adjusted or could have fallen out as well.

[@jerrysgsr7898]

I have a similar problem bro on my integra did you fix your issue?

[@jerrysgsr7898]

3 Beepz .

[@danielbecerra3773]

I got a question for everyone so my engine sounds like it runs good but then the intake sounds like normal and then tutu of air and then runs normal again and I’ve noticed the rmp was at 8 8.5 rmp up down slow what you think it can be ?

[@velador4]

Hey had few questions for you, but don't see any recent activity, are you still around?

[@GearheadsAutofab]

Not really….lol jk, I’m here I just took some time off

[@universalweapon2382]

Hey man good day . I got this problem with my legend.. I turned it all the way down an I still have the problem. The car idles at 2k rpm.. an after a while it goes up an down. 2k - 1100.. On the plastic thing that you have to screw in. The o ring was hard an it broke. I replaced it with a small rubber one.. an I still get the same problem.. can you help?

[@GearheadsAutofab]

Only thing that make a car idle high is getting too much air in to the manifold, so you need to do a smoke test or some type of leak test, you will either find a leak, or you will need to adjust the Idle screw on the face of the throttle body. Hope this helps

[@acura1384ify]

My 99 prelide automatic in coold season starts with very low rpm starts wit no problem but low rpm i have to press the gas pedal for 40 seconds like 1500 rpm to 1900 rpm to keep my engine working other ways my car stalls very bad .. can you give me an idea wath can i do and check or replace? I clean that valve still do the same just in coold season like this in north carolina .. thanks..

[@GearheadsAutofab]

Try starting the car , then unplugging the idle controll and see if it’s the same. The computer is programmed to control your idle up higher with a colder coolant temp. So it’s possible you have a bad temp sensor. But try the unplug thing and get back to me.

[@erikterock9071]

Thank you for the video, my car is having the exact same problem and your video is the first one I've seen that addresses those exact symptoms. Surging / fluctuating idle when cold, excessively high idle when hot. I was wondering, based on your experience, if you think something similar could be causing the same issue with my car. It's a 1987 Ford Crown Victoria, with the 5.0L engine. Thank you again, and keep up the good work.

[@GearheadsAutofab]

Well air leaks will always do crazy things to idle , I think your car has a stepper idle motor , there a bit different , I’m not the most experienced with American cars, but make sure it’s not leaking then try to unplug the idle motor and see if it goes smoother. Wish I could help more but I haven’t worked in any like that ever.

[@Liz_morrison]

Hey was wondering if these could just plain go bad? When I plug the hole in the throttle body, idle goes back to normal. Would like to add also that I replaced tps and that fixed the idle surge, but bow it idles at 1800 rpms in neutral. Took the fitv apart cleaned it put it back together seemed in pretty good shape, hadn't even backed out at all.

[@GearheadsAutofab]

High idle is just too much air getting past the throttle body. So any leak will do it. Also I have seen completely bad idle controll valves and fast idle valves. You could make a block off plate for the fast idle valve.

[@theoracle6005]

Is the red locktite suitable for plastics ?

[@robertsweet4112]

Thank you so much😊

[@grrfy]

Useful vid for me, but don't use loctite/threadlock on plastic, it will eat it away.

[@popoutjay7017]

i have the same issue sort of , i have a 02 rsx base im working on , weird idle , cold it’ll crank up to 2k drops down to 1500 for a couple secs then drops to 1100 , once fully warmed up put into gear and drive off bumps up to 2k and it’ll stay that way. always had p0505 i cleaned iacv ended up getting worse , swapped a 04 throttle body on and cleaned it up (obviously) but im back to square one. i had some other issues like pcv , 02 sensor , p1077 runners , fixed that stuff now im stuck with idle any help ? ik rsx doesn’t have the fast idle valve

[@popoutjay7017]

also wanna put out there i checked for vacuum leaks and i don’t seem to have any but also when i put my hand over my throttle body it won’t die , it’ll drop really low , could this be a small vacuum leak ? where could it be. the car is completely stock i bought it with this problem for cheap thinking it was a simple iac fix

[@GearheadsAutofab]

If it didn’t die , It’s getting air from some where so definitely a leak, you could smoke test it

[@andrewjchavez]

Is this the same fix for the code P1077?

[@garrettsmith8286]

My RSX is just the opposite. Idles a 400 rpm with the ac off. Just started surging & bucking today while driving. IAC was already replaced which didn't do anything.

[@danielblack8094]

very late reply, but did you ever figure out what the problem was ?

[@acura1384ify]

Im not shure ab to tite that valve cus wen i turn on my 99 prelude automatic it starts with very low rpm .. some peope says at the time you adjust the valve doit completlly then turn back 1 and half way back so no to tite .. so that makes the car starts normal with notmal rpm ....

[@kaybevang536]

My Honda Civic idle goes all the way to 5,000 rpm so I hope it ain’t something else so imma go ahead and check too see if it’s stuck high all the way

[@gailtopham4243]

I have an "88 accord with 54K miles. Idles terrible when in drive, idle goes down if I put it in neutral. Does this sound like the problem you addressed here? TX, Paul

[@GearheadsAutofab]

No that sounds like a different problem, how is the idle ? Is is surging or low or like in even ?

[@daltondaniels890]

Does the fitv leak coolant from the entire system or just whats in the valve itself? I have the exact same car and motor

[@daltondaniels890]

Please help. Thinking of doing New tps sensor and iacv

[@daltondaniels890]

Mine idles high up to like 3k when cold

[@jawaone2474]

What happens if you don’t have one of those and it’s a deleted. I’m having idle surge and I’ve cleaned IACV and checked hoses for holes or cracks and nothing. What else could it be ?

[@GearheadsAutofab]

Check the tps calibration, center wire should read about 0.44 v closed and 4.5 v open.

[@vermasean]

Nice explanation; Obligatory Liked and Sub’d! 👍▶️

[@monkeyking-self-proclaimed7050]

What is the equivalent part on an 06 rsx base model?

[@GearheadsAutofab]

No evidence really , you just have a air leak

[@ranahamayun9919]

You doing very good job 👍👍👍👍👍

[@kyranoscopy6986]

Hey mate I have a b16a2 cleaned IACV and just now did this and nothing has helped, have anything else it could be?

[@GearheadsAutofab]

Any vacuum leak will do it, smoke test or “breAk clean test, to make sure there’s no leaks. Also if your tps is out of calibration it can cause it as well.

[@jasonespiritu6681]

So I have a b16a and on cold start my car idles at around 1200k but once it's warm it'll fluctuate from 2200- 3300 will this help me keep do you have any suggestions? I know this is an old video I hope you see this🤔✌️😬

[@GearheadsAutofab]

That sounds like like it could be this yes, but also check for intake manifold air leaks, that allot of air getting past the throttle body to surge up to 3k.

[@jasonespiritu6681]

@@GearheadsAutofab ok thank you I'll tackle this today.

[@tegnando2697]

Thanks dude mine was actually loose on the inside

[@angelcasey3926]

I just built a D15b non vtec, I’ve replaced all hoses, new throttle body doesn’t have FITV on it, new injectors and spark plug wires. My Honda Idles fine till it gets warm, after it’s warm it idle surges when I press the breaks and only when I press the breaks??? Booster and brake master cylinder are new as are ALL sensors and gaskets. I cannot find the problem any ideas would be great, no vacuum leaks so I’m kinda going crazy jaja thanks

[@GearheadsAutofab]

make sure your new tps is calibrated correctly .45v or higher closed and 4.4ish open. If that’s good try replacing the I’ve way valve hose that goes to the break booster.

[@darthraider4083]

@@GearheadsAutofab I also had the tps set to 0.48V @ CT (Closed Throttle) 4.5V @ WOT (Wide Open Throttle) but it was still surging, only when applying the break at temp. Then I moved the tps to a little over .5 and the surge went away but eventually came back. So either way for sure its not the tps, Ive set it back now to the 0.48 and its still doing it TPS,MAP,IACV,IAT, are all new same with every sensor in the car.. The only thing I can think of at the time was, I changed the water pump and belt,injectors and the plugs and wires, then it went to surging, Ive bled the coolant so there are no bubbles in the radiator

[@IrishmeetsItalian]

my car started idling really high and then going back to normal after I replace the battery. What do you suggest I keep an eye out for?

[@GearheadsAutofab]

Usually those two things are pretty unrelated. I suppose it depends on what kind of car it is. Maybe just make sure you don’t have a new air leak after moving things around to do the battery.

[@adamelmachkour2506]

I purchased a new one cause i bought a civic with the end piece broken (fitv) and cause the idle drove me crazy going up and down. After insalling the new one and running the hose it still idles up and down, any ideas to is causing this headache? Thanks in advance

[@GearheadsAutofab]

Ya there is a few things, I would check your tps calibration.......if the tps reads less than 0 percent the computer some times tries to hunt for idle. With key on engine off check voltage to the center wire on the tps it needs to read at least .44-.50 volts closed.

[@adamelmachkour2506]

@@GearheadsAutofab havent done that yet, ill give it a try today thank you for the information!

[@smilinjoe23]

I started to have idle surged issues after replacing my headgasket. It's like revving really high and not sure where to start? check for leak in the cooling system while its revving up to 3500 rpm? check vac leak??

[@GearheadsAutofab]

Try just getting the air bubbles out of the system, get it up to temp , make sure both upper and lower hoses are hot then let cool all the way down , then top off . There’s other things but that’s the most common after a head gasket

[@rechelpasilan2413]

i have b20 crv gen.1 automatic trans, the problem is prior i cleaned the iacv and throttle body the idle is just fine and smooth at 750rpm. That right after i clean the iacv and throttle body and installed it, the rpm goea 2000 and goes down to 1700 if ac kick in. What possible causes of high idle of my crv? it givese me a lot of headache. Hope you can help me bro.

[@GearheadsAutofab]

Yes, the only thing that will cause that is a big vacuum leak, you may need to check the throttle body gasket and any hoses that you disconnected. You can get a can of break clean and spray it Around any possible leak areas, of the trans for goes down you’ll know there is a leak in that area.

[@Dylan9s5Nash]

No one else has shown this. I'm gonna try it but I replaced the idle air control valve because that's what the code was saying. It surges really bad when it's not in gear so I'll let you know how it goes!

[@Sixtiesera]

How'd it go man?

[@Dylan9s5Nash]

@@Sixtiesera didnt fix the problem. I replaced the throttle body. Fast idle valve and idle air control valve

[@MikeKollin]

95 Del Sol running almost perfect, great response, slightly high idle after cleaning the Map Sensor and throttle plate... I noticed when I stop at a stop sign or go to park the idle slightly goes up and down a few times then settles. I also notice if I turn a light on our press on the breaks or raise or lower the windows it also settles immediately. Is this normal?

[@GearheadsAutofab]

Well the brakes take vacuum from the manifold so it would bring the idle down just slightly and the windows take electric load from the alternator the can change things slightly. However it’s should compensate for that in the computer. Do you still have a small issue some where. Either a slight intake manifold leak or bad fast idle valve.

[@MikeKollin]

@@GearheadsAutofab Okay, I'll start with the Fast Idle Valve... Thanks!! P.s. yes a little... and it doesn't always do it either... some days it doesn't do it...

[@GearheadsAutofab]

Well there fun little cars so I hope you get it fixed 👌😎

[@MikeKollin]

@@GearheadsAutofab I learned from another video to disconnect the battery for 30 minutes to reset the computer. That definitely slowed down the idle.... About 980 rpm right now with a very slight up and down surge only after driving for a while then stopping. And it only lasts for a few to 5 surges then stops by itself. And sometimes it doesn't do it at all. I am going to buy a gasket for the FITV, clean it and make sure it's tightened. I tightened it about 2 1/2 years ago and it helped a lot too. I have a feeling that's what's causing this.... So we'll see. Both easy fixes... I cleaned the AICV again yesterday. I may replace that if these things don't work. And check for bubbles in Radiator etc... Thanks for the help!

[@Fable1Guides]

So i have a 2001 crv b20z and sometimes after driving around I go to start it up and it struggles to start and then it starts chuggs and idles super low then bounces up and idles normal. Do you think it could be excess oil from the pcv falling into one of the intake holes? causing it to sputter. Ive cleaned the iacv and this but i might clwan this again and maybe lube it.

[@GearheadsAutofab]

By chugging does is feel like missfires? Or just super low idle ? And does it smoke while this is happening. And to answer your question it’s probably not pcv, but you could pop it off and vent to atmosphere and see if it changes.

[@Iamdavidroark]

What’s that piece called? Does a gsr have it and where?

[@GearheadsAutofab]

Fast idle valve, and ya I think they have one

[@jackjacke4654]

Don't know about anyone else, but i noticed there is no O-ring on cover. What's up with that?

[@kissfan8675309]

Right! You would think it would need a seal there. I guess not.

[@capo2011opca]

i like his watch. which brand is it please?

[@allensickspeedenthusiastbl4067]

Do u know if the f23 motor has one of these? I’ve looked and didn’t see anything like this on mine

[@GearheadsAutofab]

On the f series ones there usually not located on the throttle body, and not all models have them.

[@drahzziizzard4322]

My 96 honda accord fluctuates up and down and over heated while leaking. I've cleaned the IAC and it stopped for a while now started again. I'm lost

[@BAKER_SO_LOUD]

I have an idle surge but on a 91 dx sedan and don’t know if I have that part

[@GearheadsAutofab]

Man I’m trying to remember, you definitely have a idle control valve, and I think a fast idle valve as well but I can remember fit sure, if you have it will look similar but be in a different spot. I haven’t ever had a dx idle surge so check really good for vacuum leaks first. Hope this helps.

[@BAKER_SO_LOUD]

@@GearheadsAutofab thanks man means a lot where should I look like intake gaskets and hoses?

[@GearheadsAutofab]

Ya you could try covering the intake inlet and see if the car shuts off, if it Stays running then you have a big leak. Also you could spray breakcleener around and thing that might leak and see if the idle changes this helps find the leaks.

[@BAKER_SO_LOUD]

@@GearheadsAutofab thanks man I’ll for sure give it a try 👍🏼

[@oldirtydave22]

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.

[@GearheadsAutofab]

You might have a vacuum leak, and belts should fit , the blocks the same height. I’d need to see it on this type of problem.

[@mab4870]

I have a 2009 Acura tl sh-awd and while driving under lite load my rpm jumps up 300 rpm Any idea. No one knows anything that’s causing this. No codes come up

[@GearheadsAutofab]

You’ll need to look at the computer data on a scanner, but your car the idle is controlled by the drive by wire throttle body, you may need to do a “throttle re learn” , or at least check the throttle related sensors to determine if it’s functioning correctly. That’s what I would look at first

[@mab4870]

@@GearheadsAutofab thanks for your help brother

[@CrazySquirrel98]

I have the idle up and down and what about smoking

[@bhadz100]

Hello im having high idle issues with my rsx. Basically put back the prb and stock ecu on the car and did the relearn procedure. Iacv is less than a year and i dont think i have vacuum leak. Whatelse do you think could cause it?

[@JodBronson]

@bhadz100 - Surging is usually caused by TOO MUCH " Air " or Weak AICV or dirty Throttle Body or Dirty FITV or Vacuum Leaks. FITV adjustments should " Always " be LAST in my book. Here are the steps that you should take, when you have surging issues! First, you must see Throttle Body or Clean Throttle Body and check for Air Leakages. Second, you need to check your Vacuum / Air Leakages. Third, Clean or Replace your AICV.... Fourth, last but NOT least, " Adjust " your FITV... NOTE: I DO NOT recommend adjusting FITV... I would CLEAN it first, but NOT Adjusting it! Adjusting it would be the LAST thing on the List, since the function of FITV is just adding " extra " Air to your Throttle Body / Mixture! I also like to add another NOTE.... You might want to replace the FITV rather than " adjusting " it since it rely on the " Coolant " to " OPEN / CLOSED " during Hot / Cold. But remember, this is YOUR LAST Option, if ALL ABOVE failed!

[@bhadz100]

Jordan Bronson thanks for the response. Turns out it was the TB cable too tight. Cam angle was 15 degrees on idle instead of 0. Loosen it a bit and fixed the issue.

[@JodBronson]

@@bhadz100 - Ah... OK the Throttle Cable opening the Throttle Plate causing too much Air :D

[@josel6077]

I'm having the same issue with idle fluctuations 1500- 3000 rpm. I will be cleaning the throttle body and replace the AICV. I hope it takes care of the issue.