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.

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!

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!

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!

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!

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

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

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

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

Helped me solve my problem. Thanks man!!

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.

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

Finally I fixed my idle, thanks so much man!

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

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

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.

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.

awesome info. Thanks for making video!

You doing very good job 👍👍👍👍👍

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

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

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

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!

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

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

Thank you so much😊

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

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

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.

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

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

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.

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 👍🏽

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

Only video that is for solving that issue

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

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)?

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

Thanks dude mine was actually loose on the inside

i like his watch. which brand is it please?

Is the red locktite suitable for plastics ?

I need some help with my k20 because it’s got a surging idle and it also bucks like a horse when you try to take off and just shuts down

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 ?

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

A million Love bro....

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

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

Dude thank you

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.

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 😅

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

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

Awesome!!! 🤩💯👏👏👏

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

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

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?

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

I'm loving the DC strut bar, old school.

Have 98 honda civic ex why is my rpm so low when idle whenever I STOP. It's like my car about to stall. It only happen when car is warm or hot. When cold engine or weather cold my rpm is normal at 1000 rpm doesn't go low when stop while idle. What causing this?

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 ?

Thanks much

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 ....

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

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,

That Honda idle vid was good. You guys located in Los Angeles? Need help with this idling issue, can't get my Accord to act right... Help

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

Is this the same fix for the code P1077?

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.

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

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.

Holy shit awesome dude. Fixed it in seconds. Thanks!

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?

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.

Can it cause a surge?

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.

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

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??

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

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

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?

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..

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

Whats the name of that piece ??

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

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?

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

I have the idle up and down and what about smoking

Tanks

Great vid.. where can i find the fast idle control valve of my 2012 Acura TL base 3.5 ? Im asking just in case i will encounter this problem in the future.. this DIY mini fix will save me from paying Acura dealership bills!

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

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

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?

My son's 89 Civic does it when in gear

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

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 ?

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.

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

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?

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

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