Question about 2000 Pontiac Grand Prix

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I have a 2000 grand prix gt, it has a 3.8lt, the car is idiling very high (over 2000rpm). I did replace the trottle position sensor. Still the same thing. Can anyone tell me what it might be.

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  • Pontiac Master
  • 14,036 Answers

CHECK FOR VACUUM LEAK AT THE THROTTLE BODY GASKET.OR THE THE THROTTLE LINKAGE STICKING.SCAN CAR TO CHECK IDLE SPEED CONTROL.IF IDLE SPEED CONTROL IS THE PROBLEM.BUY IT AND LET DEALERSHIP PUT IT ON BECAUSE IT WILL TO BE REPROGRAM.IF YOU PUT IT ON YOUR SELF WILL HAVE STALLING PROBLEMS.THE NEW IDLE SPEED CONTROL HAS TO BE REPROGRAM THE THE PCM BECAUSE PCM DONT RECOGNIZE IT.

Posted on May 04, 2010

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  • Pontiac Master
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The idle air control might be at fault.First try disconnecting the negative battery cable for 20 seconds to see if it will reset.

Posted on May 04, 2010

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