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I got a 1994 Prelude H23A1 and about 10 min of driving the idle would get low and the car would shake and want to stall. I would be on D4 at a stop and I can see the idle getting low, car shakes, then the rpm’s would increase a bit and do it over. It usually stalls when I stop and put it into reverse. Never happens when the engine is cold. My master cylinder is leaking since I see dried up break fluid on the brake booster and my car would rev when I press the brakes coming to a stop. It also needs a valve adjustment. No CEL codes. Can this be a timing problem?
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on your throttle body there is an idle control unit that allows a little air into the engine when the throttle is closed. Take this unit off and clean this inside with degreaser or other solvent .
here is a link to your unit at Oreilly’s …I think
If you clean the IAC valve make sure you clean in and around the throttle plate with throttle body cleaner.
here is a link for idle issues.
http://www.ericthecarguy.com/faq/solving-automotive-idle-problems
If you’re going to post about a Honda idle issue, you should read these first.
Elbow drop it, fix it right up. “kidding” If your brake booster is leaking and it only stalls when you are coming to a stop it would stand to reason that when you brake you have a slight vacuum leak. Next time it starts acting up, take it to an empty parking lot and apply the brakes, when it starts acting up, release the brakes, if the idle goes back up to normal, then BAM it’s a pretty safe bet that replacing the leaking brake booster will solve the problem. looks like someone has some getting dirty in their future, congrats.
Pat
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