1500 96 4.8 eng idles fast

Asked by lcanter Mar 01, 2014 at 11:01 PM about the 1999 Chevrolet Silverado 1500 LB RWD

Question type: Maintenance & Repair

i have replaced idle air c, manifold af, ect, cool temp senor, vss, egr, throtles position s,
does not show a code  idle speed 1300  to 1800 rpm! need help?

2 Answers
199,775

dandyoun answered 10 years ago

Possible vacuum leak. Have you checked your pcv? If it's stuck open could possibly cause this issue.

Mark helpful
170

Danny answered 10 years ago

Check the gasket at the base of the throttle body and try some spray intake cleaner on the butter fly in behind the air intake.

Mark helpful

Your Answer:

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