1992 Grand Am Intermittent Idle Stall

1992 ALL OTHER MAKES ALL OTHER MODELS

TKLINCK

MEMBER
8 POSTS

I have a 92 Grand Am, 6 Cylinder that has an intermitten idle. By this, I mean the engine revs up, the back down causing it to almost stall, and sometimes stall it out. I've done full tune-up on it, reset timing, replaced oxygen sensor and was checking into the MAP sensor, Knock sensor or IAC valve. Any ideas of where to start?

Jan 19, 2006 at 12:09 PM

TKLINCK

MEMBER
8 POSTS

Or could it be the Throttle Position Sensor?

Feb 2, 2006 at 12:15 AM

CHEVY350GUY

✓Experienced Mechanic
109 POSTS

first clean as far in to the throttle chamber as you can. then remove iac valve and clean it's port. if idle remains the same i would start with the iac valve because you said it happens when you are at idle.

Feb 2, 2006 at 2:09 AM

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Suggested Repair

Clean as far into the throttle chamber as possible, then remove the IAC valve and clean its port. If the idle problem remains, start with the IAC valve because the surging and stalling occur at idle.

Conversation Summary

The owner of a 1992 Grand Am with a 6-cylinder engine reported an intermittent idle that revs up and then drops, nearly stalling or stalling. A full tune-up, timing reset, and oxygen sensor replacement had already been done, and the owner was considering the MAP sensor, knock sensor, IAC valve, or throttle position sensor. The expert advised cleaning deep into the throttle chamber and cleaning the IAC valve port, then focusing on the IAC valve if the idle issue continues.

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1992 Grand Am Intermittent Idle Stall

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