2001 Pontiac Grand Prix Intermittent Fast Idle

2001 PONTIAC GRAND PRIX
120,000 MILES • 6 CYL • FWD • AUTOMATIC
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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.
Apr 19, 2009 at 10:52 AM
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LEGITIMATE007
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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?
Apr 19, 2009 at 11:43 AM
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