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2001 Pontiac Grand Prix Intermittent Fast Idle

Tiny
SCROZY
  • MEMBER
  • 2001 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 120,000 MILES
Intermittent fast idle, sometimes up to 2500 rpm. No relation to air or engine temp, except it happened very little during winter. Now it happens several times a day. Some times it happens from the time I start the engine, other times it starts happening while driving. If I restart the car some times it will be ok. Tune up done recent, no effect.
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Sunday, April 19th, 2009 AT 10:52 AM

1 Reply

Tiny
LEGITIMATE007
  • MECHANIC
  • 5,121 POSTS
Hi, thankyou for donating, the way you are describing it, it sounds like either your throttle position sensor(tps) is going bad or you may have a vacuum leak or two, possibly a crack in one of your vacuum hoses, do you have a check engine light on yet?
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Sunday, April 19th, 2009 AT 11:43 AM

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