High idle problem [Archive] - GrandAmGT.com Forum


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10-07-2010, 12:35 PM
I saw this post on here before but cant find it and i was wondering if someone could pinpoint my problem. I have the high idle that are common with the grand am. I cleaned out the IAC valve port and tried cleaning the throttle body as good as i could it stopped the high idle for a few days then it was back. But if i run it for 5 minutes, then shut it off-then turn it back on it idles properly?? IAC valve ?? Throttle positioning censor??

10-07-2010, 04:09 PM
TPS change needed. I just did mine that was causing my high idle. If you have a scanner you can see throttle %. It will probably be 4 to 5 % when idle is high.

10-08-2010, 07:01 AM
Change it if the free fix doesn't work. Search " TPS Relearn". Its a topic started by me ( which needs to be stickied as this problem is so darn common on these cars) and it explains how to give the TPS its "relearn" procedure. Its quick, its easy, and best of all... its FREE.

10-08-2010, 08:26 AM
i have a scanner.. do you just plug it in and start car and it will automatically tell you what throttle % is?

I'm the one that had the old thread about it a couple weeks ago.

Hopefully yours is simple, because mine isn't. New IAC, new TPS, new Air charge sensor, still same problem.

Good luck, sir.

10-08-2010, 04:16 PM
On my scanner you would go to the live data section and scroll down to see the throtle %.

10-11-2010, 10:56 AM
yeah my scanner didn't do it, but anyways i fixed my problem lol don't know about this guy.

10-11-2010, 10:57 AM
if you have aftermarket throttle body make sure plate is closed! :)