2002 impala won't idle down

5

Asked by Mar 15, 2016 at 11:14 PM about the 2002 Chevrolet Impala LS

Question type: Maintenance & Repair

When I crank, drive, put it in park, reverse, it won't idle down.
When I drive it is have to keep my foot on the brake so it won't
drive itself and that's scary!!! Please help me, I'm about to give
up.

6 Answers

605

Is your check Engine light on? Does it idle high as well or only in gear? It's more than likely a pretty big vacuum leak or TPS (Throttle Position Sensor), and possible the IAC (Idle Air Control) Valve. If there is no check engine light, have a smoke machine hooked up to the intake somewhere and you should find a vacuum leak.

1 out of 1 people think this is helpful.
5

Thank you so much!! Will let the mechanics know first thing in the morning.

5

No the check engine light isn't on.

605

Most likely a vacuum leak. Good luck, I hope they can fix your problem:)

5

Okay! Thanks!!

605

I'd be interested to see what your mechanic finds. Keep me posted please.

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