Throttle idle sensor I think

Asked by Oct 20, 2016 at 01:39 PM about the 1999 Chevrolet Blazer 4 Door LS 4WD

Question type: Maintenance & Repair

From a cold engine til engine warms up.  Through
rpm gauge jumps all over and truck Jerks and is
sluggish. Is it my throttle idle sensor?

1 Answer

242,255

Maybe, but I'd clean the throttle body and MAF first. Procedure on how to do it , you can find online on places like youtube. Also check for vacuum leaks, Is the check engine light on?

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