Hey folks, I had a thread posted a good while ago about my 1,500 RPM idle while rolling down the road. Everybody was swearing it was the IAC, even though I said the problem was intermittent and not constant, which made me and my roomie to look for other things besides the IAC valve. Figured instead of resurrecting an old thread and possibly causing confusion, I'd post a follow-up on my issue and hopefully help anybody else with similar problems.

Also the fact that the stupid little thing costs an arm and a leg.

Symptom: Car would intermittently hang RPMS up if revved, and idle at 1,500-2,000 RPM while it was rolling. Would idle back down when stopped, tell-tale IAC issue right?

Solution: Throttle Position Sensor

We were checking sensors, figuring that just because the IAC is making the car idle high, it didn't mean it was defective. Perhaps the IAC was just doing what it was told. Turns out this is what happened. After hooking a volt meter up to the TPS and running it back and forth, it was noted that it yielded inconsistent numbers, and sometimes numbers that were way out of range. Replacing the TPS made the car run PERFECT, like a whole new car now. And for 1/4 the price of a new IAC, that would have been a waste of money.

Lesson:
Don't go all ***** nilly and replace parts without checking them out first. I've seen horror stories of people racking up huge bills trying to fix something that would have cost next to nothing to remedy. A little research and some basic tools works wonders. =]

 

correct I replaced my TPS to fix hanging RPMs.

 

Good job! Just slowing down and thinking things thru can save some time and money!

 

Yup I was chasing after lean code problems thinking it's a vacuum leak dropping mad money on manifolds and such. Turned out to be a 50$ tune to fix it with my longtubes lol

 

You know this has happened to me about 3 to 4 times... So good to know thanks! Altho not recently so maybe it fixed itself lol

Anyways thx