How to clean Honda Prelude IACV - idle air control valve (H22)
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- Опубликовано: 3 июл 2020
- In this video I clean the Idle Air Control Valve(IACV) on the Honda Prelude. After having a rough idle and the IACV getting stuck closed I decided to clean it. This is relatively simple to do as you just need to remove two bolts and two hoses connected to the valve itself. After you remove it you just need to unscrew three phillips head screws to open one side of the valve and the other side just has two ports with one containing a small metal screen. You just need to spray the ports with Carb cleaner and remove the deposits with a paper towel. Make sure not to get any liquid inside the sensor itself. Hope you enjoy.
- Carb Cleaner - amzn.to/2YUpwwi 👍
- Craftsman mechanics tool set: amzn.to/3N7JrRB 🔥
Instagram - Automotive_obsession1 
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Just bought my Lude and had this code come up great video man keep up the great work
Thanks. Good luck with you new Honda Prelude.
This is a very nicely done video. Concise but with helpful tips.
lewishou thanks
Ayy thanks for making this dude, couldn’t have done it without u💯
Thanks I really appreciate it
This is great. You covered this valve cleaning like I would. I will link your video to my fast idle air control valve video.
ruclips.net/video/gxEAj7ou3pY/видео.html
Thank you. I really appreciate you sharing the video and I'm glad it helped.
That's exactly why I had to clean my IACV because of the idle issue in your video.
Dude you fixed my lifelong problem man! Let me know if you wanna link preludes if you’re ever down in Texas! Saved as money and time man thank you again
I appreciate the support. I had the same problem for a while so when I went to fix it I decided to film a video and share it because I figured someone else could have the same problem. Happy to help you solve your idle problem, save you money and save you time. If I ever drive my prelude to Texas I would definitely like to meet other Prelude owners and check out the car scene down there. Thanks for the invite. Keep working out you made a lot of progress. I like your three year transformation video it's very inspirational.
Thanks for this video very educational and straight to the point my 5th gen started idling at 1k then would bounce to 2k it's called a surge and I was doing my research and stumbled upon your video gonna take it off clean it up and I'll update this comment when the car is fixed !!
Anytime. Thank you for the support. Feel free to comment after cleaning your IACV because I have to replace my IACV because it's faulty and I'm currently waiting for the replacement part to arrive so I can film, edit, and upload the video. Let me know if this helps and if not(I hope it does) then you can watch my future video on how to replace your IACV.
@@automotiveobsession7265 mine might be faulty then because I just cleaned it reinstalled it I started the car it started idling smooth for like 20 seconds no surge I shut the damn hood it started surging again so idk
@@cgslidez That sounds exactly like what is happening to me when I start the car to warm it up because it starts fine and like 20 seconds later it starts to surge. Still waiting for the new IACV so as soon as I receive it I will be installing it and filming a video on it.
Wow thanks for sharing. Brilliant. I ve got exactly that issue. Some silly mechanics wanted me to junk the engine 😢
Thanks. Glad it helped. Also glad you didn't junk your engine.
Thanks for the tips!
Anytime.
VERY VERY Helpful! Thank you!
Glad the video helped you. Thanks.
Good video just did it today but i cleaned the trhottle boddy remuving the whole part i cleaned and i cleane to tha valve that you cleaned.. quick tip .. adjust the gas pedal wire cus is lose...i can see that and it will be better gas response when you push the gas pedal..
thanks. I definitely need to adjust the gas pedal wire because it has some play in it but thanks for the heads up.
Thanks for the video. Unfortunately my 2.2L 1997 Prelude's IACV doesn't look anything like the IACV in this video. In fact I can't even track down a replacement IACV for my Prelude. I just had the engine rebuilt and it runs great except the idle which is rough and jumpy. Could be TPS or O2 sensors, but more likely the IACV. Getting a little freaked out by the fact that I can't find a replacement or locate a mechanic to clean my particular IACV.
They don't make replacement IACV for the 97,98,99,2000,2001 prelude's anymore. I got lucky I made this video when they were still available because I had another issue with the car and it's idle and I believed it was IACV and had to buy used one's because there were no new replacements. Later I found out it was not the IACV but even used they are getting very expensive. I wish you luck trying to fix the IACV for your car so you can enjoy your new engine build. If I can find anything that can help I'll comment it here.
Thanks worked perfect
Thank you. Glad it helped.
Dude, thank you so incredibly much! I was at the gas station and it was idling funny, so I'm definitely going to do this. Also, would old spark plugs cause idling problems as well?
You' re welcome. Glad I can help. Yes old spark plugs could cause idling problems.
What year is this prelude? I'm getting a 1990 prelude 4ws in mint shape 1 owner always garaged and never driven in winter. Only issue is this iacv issue with the idling up and down. Curious if that's the same valve in mine is all in case I needed to buy a new one or new seals. My 94 accord coupe does the same thing as well but I've just dealt with it as its intermittent. Great video! 👍
Thanks. This is a 2000 honda prelude. Congrats on buying a nice example of the honda prelude. I don't think the IAVC will be interchangeable because the 1990 honda prelude has a 2.0 L engine while the 2000 honda prelude has a 2.2 L engine, these engines are different. Also not sure if the mounting bolts will line up.
Are the bolts on tight do you have to use a breaker bar?
The bolts are not tight enough to have to use a breaker bar.
Is it normal for no coolant to spew out of the IACV tube?
No. The coolant should run through the IACV lines to help the valve work properly by raising the idle when the engine is cold and lowering it when the engine is warm. This is done by IACV when it measures the temperature of the coolant. The coolant should not just spew out of the tube.
Do I have to “relearn my idle” after I do this or is that not necessary? I also cleaned the fast idle.
It's not necessary. After I cleaned mine I just put it back together and the car ran fine. It's good to also clean the fast idle valve to further clean the system and do more preventative maintenance.
Do I have to worry about spilling coolant when removing the hoses?
It's happened to me sometimes and other times it has not spilled anything. I would say just to be ready for it but usually it's not much that it spills. If you do this right after having the car running then the chances are greater for a spill.
can you use throttle body cleaner instead of carb cleaner or is there a difference
Throttle body cleaner also helps remove carbon build up so yes you can use throttle body cleaner if that's what you have.
Just blow it out with an air hose if not too dirty. Don't have to use super caustic chemicals for every little thing. Not to mention those cleaners love to cause flash rusting and or make plastic connections brittle AF
Thanks so much iam so frustrated because my car needs to do that cleaning I have a Honda prelude 1998
Any time. I know the feeling of frustration dealing with the IACV. Good luck.
Hey bro when I replace the iacv would it be best to bleed it from the radiator or the little screw? And how long do I need it bleed it for? I'm afraid the bubbles would be so small I might miss it and not know when it's good to go 😅. Thanks for your help bro! 😊
I usually bleed the entire system. From what I remember the manual says to bleed the system until you see and hear the radiator fans come on. This should take about 15 minutes. If you have a radiator funnel kit it should help with bleeding in general and you can the bubbles more clearly. This is what I do when I bleed the system for any reason.
@@automotiveobsession7265 thanks bro I really appreciate it!
Will there be coolant leaking out from the lines?
Yes. How much depends on how much time after turning off the car you decide to clean your IACV.
My 1988 was super clean after 300k miles. Where you been driving that thing?
I had not really driven the car that much when I made the video. It was like that when I bought the car. Nice keeping the prelude that clean after so many miles.
I did this to my car and it causes the idle to drop even lower. I had to raise the idle screw.
I did not experience that with my car after I cleaned the IACV. It could have been something else that may have caused that.
What car cleaner did you get?
I used Autozone carb cleaner but you can also use this one - amzn.to/3Qzomyp
Can I clean it with throttle body cleaner?
Yes you can.
Thank you
@@lahmanpo9570 Any time.
Also, can I use brake cleaner to clean the IAVC?
As long as you spray the valve when it's off the intake and make sure it dries completely before installing it then yes you can use it.
@@automotiveobsession7265 Dude, thank you so incredibly much! Thank you for responding so fast! I don't think I've ever had someone reply so quick. Thank you again, man! ✝️
@@They_drew_first_blood 😄Anytime.
what product spray can you use for cleaning?
Carburetor cleaner
@@automotiveobsession7265 which would be the meat one to go with? Which brand?
@@dredarko8174 This is a good option amzn.to/3Qzomyp
Hi what cleaner did u use
Autozone carb cleaner
Can you do the fitv too please?
I have to inspect it anyways so I'll make a video on it. Thanks for reminding me.
Is this what you need? Let me know what you think and thanks again for reminding to check and clean this part. ruclips.net/video/FhrLBD_xUJA/видео.html
I having a problem with reving my engine
It's not taking rev
Can someone please help me ?
I have not experienced that with this car. When my transmission broke I could still rev the engine but it would move only in first gear and not in any others. I would say read on forums what could it be but I honestly can give you any details as to what it can be since I have no experience with this issue as of now. Hope you can fix it.
HONDA PRELUDE model YEAR ? ENGINE ?
Honda prelude 5th generation from 1997 to 2001. Engine: H22a4 4 cylinder engine.
@automotiveobsession7265
Thank you .
Mine is a 89 2.0 SI & wants to stall when I accelerate .
You forgot to tell them to bleed the air out of the system and top off the coolant..
You could be correct I'm not sure because I did not leak any coolant and did not have any air in the system after cleaning the IACV. I didn't bleed any air out of the system. I still appreciate the comment.
Everyone says that but neither of us had that issue. Mine was the FIACV, and yours was the IACV.
I just cleaned it and it's still bouncing at idle :(
My car did it again the other day but it went away. The engine usually does that when it's cold but when it's warm it stops doing it.
@@automotiveobsession7265 for me it was quite the oposite, it was only bouncing when warm, but I deleted the IACV and the FITV and now it doesn't bounce anymore, I get to adjust the idle rpm with the throttle body screw only
@@charlie_mk7.5 How’d you do that? My prelude is bouncing at idle too and idle control valves for 5th gen preludes are hard to find and expensive too. Also do you recommend it?
@@lolmikez218 how’d it go for you I have surge in idle too
@@sawsinit544 It turned out that i had a vaccum leak from my manifold gasket. The guy my dad had got to clean the ports didnt scrape off all of the old gasket so it didnt settle good and made the car surge. I would reccomend first cleaning your IACV, then cleaning/ tighening your FITV. If those two doesnt work then you need to check your vaccum lines and spray around the areas where gaskets sit. (throttle body and intake manifold) I think i used mas air flow sensor to spray around my manifold or brake cleaner. I dont know if those were the right things to used but i found the issue when spraying them