2001 Pontiac Montana idle trouble

2001 PONTIAC MONTANA

210,000 MILES • 6 CYL • FWD • AUTOMATIC

CHRIS BIGGS

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Engine idles really high when in park. Idles down when put in gear but still is idling higher then it should be. What could be causing this and how can I fix it?

Feb 16, 2015 at 10:14 AM

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HMAC300

CAR REPAIR CONTRIBUTOR
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I would service that throttle bore and check for vacuum leaks, here are three guides to help us fix it.

https://www.2carpros.com/articles/throttle-actuator-service

and

https://www.2carpros.com/articles/engine-idles-too-high

I would also swap out the idle air control valve which is on the side of the throttle body. They can get weak and not respond as well. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Feb 16, 2015 at 12:12 PM