S2000 Idle Problems - (IACV) Idle Air Control Valve FIX

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S2000 Idle Problems - (IACV) Idle Air Control Valve FIX

Рет қаралды 11,514

Күн бұрын

This is a very common problem we see with S2000s. Many K series have the same issue too.
I hope this how to video will help you understand how the valve works and how to clean it yourself.
Take your time and this will save you $$$
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Пікірлер: 84

@NathanThrower Жыл бұрын

You’re spoiling us with back to back videos

@SilentCivilian Жыл бұрын

Thank you guys for actually listening to your viewers and taking the time to educate people on the proper way to do things!

@VirtualGuth 7 күн бұрын

I’m a subscriber who gave this video a like. But good, detailed content like this is worthy of additional acknowledgement, so thank you for making the effort to share such knowledge! This appears to be something that every S2K owner who works on their own car is bound to run into at some point. Much appreciated.

@LHTPerformance 7 күн бұрын

@@VirtualGuth Thanks for taking the time for the comment. Glad it’s helping S2000 owners. Please hit the subscribe button

@russellmallette 2 ай бұрын

THIS was the solution to the stumbling idle on my new-to-me AP1. The shaft would turn, but with resistance. A few flushes with cleaner and it spun freely. Problem solved... great video and I had to use the hacksaw trick on the bolts because no one on earth has a 4mm 5-point star bit 🤣😂

@LHTPerformance 2 ай бұрын

Glad it worked out!

@mattvav Жыл бұрын

Thank you for yet another how-to video. You guys have put out a lot of helpful information over the years and it’s greatly appreciated, especially from all the do it yourself enthusiasts here. Your channel has helped me with my own turbo s2k build and a lot of the inspiration to tackle it myself has been from watching your channel so thank you. Wish I could have brought it over from canada for some in person LHT TLC but showing what you guys do over youtube has made all the difference.

@ronmann2755 Жыл бұрын

I'm glad I waited before attempting to clean my IAC. Your way is much, much simpler.

@CapitalNULLNull 5 ай бұрын

Did this last night because the idle hunt was driving me insane. The s2000 community here in CapeTown is very appreciative of your videos. 🙇‍♀

@LHTPerformance 5 ай бұрын

Thanks so much 🙏.

@bluedragonbikerskin855 Ай бұрын

Thanks going to get to that since I just cleaned out the injectors on the 02 model year. Love your educational videos, one of these days I'll bring her to your shop for some TLC! Thanks

@aRandomAggie Жыл бұрын

I never knew the trick about adjusting the motor orientation, I’m going to try that!

@erics902 Жыл бұрын

As other viewers have stated, "a great video" and it is uncanny how many S2000 nuances you guys have dealt with. Love the video training.

@crxbb9506 Жыл бұрын

Thanks for sharing this with us! I had to replace an ICV on a 90s Toyota Tacoma - quickly learned that a JIS type bolt head was not the same as a Phillips for the bolts that held it together

@1stock1not Жыл бұрын

Same with my civic. I just used an impact driver to break them loose then a regular Phillips #2 will take them out

@jasonedwards3716 Жыл бұрын

As always very informative. Thanks for passing on your knowledge. Appreciate all your content. Wish we had an expert in the UK like you guys.

@bvward Жыл бұрын

John, I had to buy Torx bits to change out the grille on my VW... Looks like the whole car is assembled with them. I like to change the ones I may remove in the future with stainless hex heads and a bit of anti-seize... I believe Torx were developed to simplify production line assembly.

@peterhoughton1731 9 ай бұрын

My 05 s2000 had this exact problem. It show a po172 running rich code. Tried cleaning it out which helped a lot but still not quite right so I bought one of ebay made in china for £32... and its now perfect. A tip for this job......remove the battery as it makes access much easier. Great video..just subscribed.

@sixstrz8310 7 ай бұрын

If you remove the battery don’t you need to reprogram the stereo? That’s what I have heard before.

@LHTPerformance 7 ай бұрын

@sixstrz8310 yes. You’ll need the radio code

@MrTIGERH1752 Жыл бұрын

Good tip for newer mechanics, slotting the screw head with a hacksaw. The thing is, the screw head is a #20 torx, which is very common in 2023. Tim

@ericb1054 Жыл бұрын

Thank you for making this video. I’ve cleaned my iac before, and it improved but the car still drops idle too low sometimes and recovers when the fans kick on or stalls. I think the bolt trick at the end is my issue as my car is supercharged. I tightened the two bolts back tight like they came from factory last time I cleaned it. Hopefully backing them off a bit and adjusting the motor back and forth should stop the issue.

@chrisH-uv5wx Жыл бұрын

Excellent how-to John! Love these tips 🍻

@TheVegacorrea Жыл бұрын

Just in time!! I’m with this problem today

@toddsussman9026 Жыл бұрын

Only the best content from LHT.

@riityee 6 ай бұрын

Zero dislikes …. I love you guys

@p4r4n01k0 8 ай бұрын

thank you so much for your knowlenge, greetings from Spain

@LHTPerformance 8 ай бұрын

Thanks for watching. I visited Spain a few times as a teenager. I love that place.

@renardthefox3176 Жыл бұрын

Many thanks for the excellent how to Video, and I also like the idea how to open the Torx screws, if you don't have a Torx bit set. In Europe these screws are almost everywhere 😅 I recently went through the service manual and saw, the Facelift has a slightly higher idle than the pre-facelift, was that achieved maybe by the position of the motor?

@zpzp96 Ай бұрын

I think I need to do this, but dang I guess I should do a coolant flush with it as well

@pault6533 Жыл бұрын

The coolant path has a reason. The coolant design assures the idle is higher when the engine is cold. A thermowax activated shaft opens the IACV when cold and the warm coolant causes the wax to contract the shaft when the engine warms.

@LHTPerformance Жыл бұрын

The idle valve is controlled by the ecu, it sounds like your talking about a thermostat.

@pault6533 Жыл бұрын

Nope. Take a look at any Helm service manual which describes the IACV operation including the thermowax device.

@LHTPerformance Жыл бұрын

@@pault6533 I’ll take a look in the Honda Service manual tomorrow and confirm 👍🏻

@pault6533 Жыл бұрын

Cool. You’ll be surprised that this is a “secret feature” which assures a good cold start until all the sensors catch up or if the computer is in limp mode. It works on the principle that wax changes volume when it changes from a liquid to solid and back, which can drive a piston and change the position of a valve. Knowing this can help diagnose other IACV system issues.

@pault6533 Жыл бұрын

Update: I reviewed the service manual myself (00-03) to find information about the IACV features of the s2000 in particular. Apparently, the thermowax device is not present on the S2000, as it had been on many other Honda/Acuras I previously had. Perhaps the coolant path is to make sure there is not "icing" under the right dewpoint conditions which could make the throttle valve stick open. I don't know about anyone else, but on a cold start the engine races up and down. Has been this way since day 1. Maybe Honda SHOULD have put in the thermowax actuator!

@KevDcFive Жыл бұрын

Looking your videos for years- love them. Thank you! Best regards from Germany ✌🏻

@dr.feinstone9196 27 күн бұрын

can I use throttle body cleaner to clean IACV ? Great video and very informative.

@RetroDevaughn Жыл бұрын

my request has been heard! thanks LHT!

@sc4rf4ce1983 Жыл бұрын

I used cue tips to clean my iacv valve out. They got into to all the nucks and crannys workout having to take the sensor off.

@cravejdm Жыл бұрын

Could you do the same thing, say with a 99 civic, and do you have any advice on the best way to fix the ELD , electric load detector problem. Thanks for all the great information, John and George. You guys are the goats. Thanks again

@manuelgutierrez7568 Жыл бұрын

Thank you so much going to give it a try!

@Rob.Coleman Жыл бұрын

Very nicely explained, thanks for sharing 👍👍.

@chilivanye670 Жыл бұрын

Thanks a bunch John. Great video.

@tmango78 Жыл бұрын

Awesome! Thank you for making this video!

@LunchmoneyH Жыл бұрын

The 5th gen prelude like mine is plagued with iacv issues, can see it all day on the forum's, when I hit the salvage yard this is one of the first things I recycle, yes they certainly can be expensive.

@LHTPerformance Жыл бұрын

Yes. These rotary style have more problems than the early ones from what we see.

@copperfit4087 Жыл бұрын

Since Toyota and Honda is so close to each other it’s crazy to find out that this is happening To the S2000 for them years. My sister got a 2006 Toyota Solara that had the engine light to come on and go off and this is what the code said it was.

@robertjordan9075 Жыл бұрын

Thanks for the info my friend. Have a great weekend.👍🏽👍🏽👍🏽

@H4zZ4rDGaming1 11 ай бұрын

awesome vid, thanks

@jordanroger70000 11 ай бұрын

This can help with this problems ? My car struggling when i stay a long time in slow trafic (1st gear 5mph). I press a bit gas pedal the some times we can ear the engine/exhaust start doing shit and if I Floor the pedal the car wont accelerate and shake me like crazy

@blakebarnes5816 Жыл бұрын

funny i cleaned mine out a few years ago and an old mercedes tech i work with had the bit to remove the bolts to the solenoid--he used it once in his life for a mirror on a 1989 SL or something

@lorilightfoot6447 Жыл бұрын

Great video! What's your advice and tips on installing a rear main seal on a F20 ? I've been reading that you may need spacers if there a wear groove. Is this correct? Thanks for everything to do!

@LHTPerformance Жыл бұрын

Plenty of oil and build it over the crank so not to fold the seal. It’s pretty straight forward.

@lorilightfoot6447 Жыл бұрын

Thank you! Edit: John thank you for the advice. I installed my rear main seal, and clutch (Both OEM) yesterday and everything turned out great. Besides a few rust belt hiccups.

@altimatic2183 Жыл бұрын

I can't figure out how to remove that damn coolant hose from under the iacv. The long thin hose

@H4zZ4rDGaming1 11 ай бұрын

so, i think i saw it in your video but just to be clear, the valve should move SUPER smoothly, no resistance at all? mine has a slight resistance even after cleaning. wondering if i need to replace the valve

@LHTPerformance 11 ай бұрын

If you remove the motor. It should be perfectly free. No dragging or resistance.

@H4zZ4rDGaming1 11 ай бұрын

@@LHTPerformance mucho thanks. you're working awfully late on a weekend haha

@fabioayala2104 11 ай бұрын

I lost the spacers cleaning it - any recommendations where I can buy them?

@LHTPerformance 11 ай бұрын

I don’t think you can buy them. You may try some small washers

@davidstory26 Жыл бұрын

Mine only drops idle when I push the clutch in with the a/c on. Any suggestions

@camlobesvtec Жыл бұрын

I deleted my iacv on my turbo rsx as a cooling mod. Now I'm wondering if you reccomend putting it back on. What do you think? Excellent info.

@LHTPerformance Жыл бұрын

Yes. I always recommend a IACV unless It’s a race car. Street cars with AC and PS need these.

@Austin-bi4fr 8 ай бұрын

ive tried clean the IACV a few times but how exactly can i fix the idle randomly bogging down when I clutch in? Like when I reverse into my garage and clutch back in to coast backwards the car bogs and shudders for a second then goes back to normal

@Austin-bi4fr 8 ай бұрын

even in neutral if I am just sitting it will randomly shake

@SuperBullyone Жыл бұрын

What do you think if I buy a new one, just to play it safe? Do you sell this part? What is the honda part number?

@LHTPerformance Жыл бұрын

90% of the time we can clean and fix them.

@frostyblinks Жыл бұрын

What’s a normal idle range to know if your car is idling high or low..

@LHTPerformance Жыл бұрын

Around 800-900rpm

@maverickmartin4876 11 ай бұрын

I replaced the entire Idle Air Control Valve because I was experiencing the same issue with the rpm dropping too fast and the motor stalling out on me, and I’m still having the same problem… any suggestions?

@LHTPerformance 11 ай бұрын

Check the voltage on the TPS

@amadafaka Жыл бұрын

Honda from the northeast will have those bolts rusted solid and the aluminum body will have heavy corrosion causing the valve to sieze. I have purchased a cheap aftermarket iac and swap the solenoid over. A used Honda solenoid will be more reliable than a aftermarket solenoid.

@domo5584 Жыл бұрын

I think my tps is going bad in my Ap1, it chokes and hesitates sometimes when I give it throttle. Happens maybe twice a month

@LHTPerformance Жыл бұрын

Use a voltage meter and see if the TPS has accurate read out and no breaks.

@bishnusharma3098 7 ай бұрын

Anyone here has P0500 Circuit A code pop up fixed? Been scouring the internet and no answer, can’t seem to figure it out. Any help is appreciated.

@lorenwatts2920 2 ай бұрын

What about the Dive By Wire AR2's? They don't have IACV.

@LHTPerformance 2 ай бұрын

They don’t have the issue. Hence why almost every manufacturer changed to them.

@lorenwatts2920 2 ай бұрын

@@LHTPerformance I appreciate the response. I wasn't clear. I was looking for a fix to a DBW AP2 with a rough/low idle.

@LHTPerformance 2 ай бұрын

@@lorenwatts2920 I would check the basics. Plugs, Valve adjustment, injectors etc for a stumble

@lorenwatts2920 2 ай бұрын

@@LHTPerformance Thank you

@lorenwatts2920 Ай бұрын

Just wanted to post an update about my 2006 DBW S2000's rough idle. The fix was a Valve adjustment. The #3 cylinder's exhaust valve clearance was less than .003 and spec is .010 - 011. At 66.000 miles this is the car's first valve adjustment. A few months prior to the valve adjustment I had changed the plugs and coils. I really appreciate your DIY help and enjoy the S2000 videos.