Idles high when in drive or reverse just replaced throttle body and tried to reset pcm didn't work

Asked by Nov 28, 2016 at 11:15 PM about the 2003 Chevrolet Silverado 1500

Question type: General

1 Answer

78,065

Sounds like a either an unmetered air leak or a vacuum leak. Recheck your work make sure you have a good seal on the manifold and you didn't miss any vacuum lines or fresh air tubes.

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