2004 Chevy Impala High Idle Speed Car accelerates on own

AJ1

MEMBER
2004 CHEVROLET IMPALA
6 CYL
FWD
AUTOMATIC
16,000 MILES

I have been having trouble for the last 1 1/2 years with an intermittent problem when starting my car I will get a high idle (sounds like a jet engine) sometimes if I push the accelerator as I am turning the car off it will help me have a normal idle when I resart the car. The car has also been know to idle high when driving it I can go as high a 40mph without putting my foot on the accelerator at all. If I am lucky enough to get a code (haven't had one in over a year now) it will show TPS which has been relaced 3 times already. Anyone have any ideas before this car gets me or someone else hurt in an accident?

Sunday, February 7th, 2010 AT 3:15 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Hi AJ1, Welcome to 2carpros and TY for the donation

Try cleaning out the idle air control valve and passages, inspect the throttle plate if its fully closing at idle if not could be carbon/varnish holding it open, sticking linkages/kinked acc cable-and also test the TPS closed idle and wide open throttle voltages-

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Monday, February 8th, 2010 AT 1:45 PM