High Idle

packerbacker · #1 Oct 15, 2007, 04:53 PM

I have a 94 Grand Am 3.1 liter engine that while in park idles at about 2500 RPM and when you put it in gear may go down to about 1500RPM. After warming up a bit it might drop to about 2000 RPM. Didn't see any obvious problems.

CaptainRich · Oct 16, 2007, 05:31 AM

Quote:

Originally Posted by packerbacker

I have a 94 Grand Am 3.1 liter engine that while in park idles at about 2500 RPM and when you put it in gear may go down to about 1500RPM. After warming up a bit it might drop to about 2000 RPM. Didn't see any obvious problems.

High idle on these is often times due to a vauum leak. Could also be binding throttle cables or sticking IAC valve. Is the MIL (Malfunction Indicator Lamp) staying on? Or had any recent underhood repairs?



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