Recently my car has been trying to overheat when it has antifreeze in the reservoir. Also it has been trying to accelerate on it's own and when I put it in park or neutral the rpms rev up between 3 and 4 thousand rpms. The throttle is not sticking and the pedal is unobstructed. Where should I begin to try to fix this problem?
Overheating and accelerating on its own on 1999 Pontiac Grand Am
by soldierboy064 in Murphysboro, IL on March 01, 2009
2 answers 1 comment
ANSWER by hemicuda , March 04, 2009
You need to put a scanner on this vehicle and see what code comes up, I think autozone still does this.
ANSWER by Yessir , April 10, 2009
My '99 does the same thing. Please let me know if you find out what causes it. Typically, all I have to do is turn it off and restart it. Most of the time that seems to do the trick.
COMMENT by Visitor , December 28, 2010
IAC sensor does it. just replaced mine today and the car doesn't accelerate on its own anymore...