2005 Chevy Silverado

2005 CHEVROLET SILVERADO
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CANLEGLADE
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  • 2 POSTS
Engine Performance problem
2005 Chevy Silverado 6 cyl Two Wheel Drive Automatic

Have a 2005 Chevy Silverado that idles high and when you cover the throttle body with a shop rag this will make the idle drop back to normal. What might be the problem?
Sep 23, 2010 at 3:21 PM
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DENNYP
  • ✓Experienced Mechanic
  • 1,824 POSTS
Sounds like you have a vacuum leak on the intake side. Try spraying some throttle body cleaner around the intake gaskets with the engine at idle. If the idle changes, you have found your leak.
Sep 24, 2010 at 5:56 AM
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