Low engine idle speed?

2008 CHEVROLET IMPALA
112,000 MILES • 6 CYL • 2WD • AUTOMATIC
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All is normal except the RPMs has been lowered all of a sudden?
Oct 16, 2022 at 2:44 AM
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Yep, this can happen if the throttle body needs service or there is a vacuum leak. here are three guides to help us fix the problem. Also, we should run the codes as well.

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

And do this guide when the engine is cold only:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

And to get the codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please go over these guides and report back.
Oct 16, 2022 at 1:06 PM