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2005 Chevy Silverado

Tiny
CANLEGLADE
  • MEMBER
  • 2005 CHEVROLET SILVERADO
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?
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Thursday, September 23rd, 2010 AT 10:21 PM

1 Reply

Tiny
DENNYP
  • 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.
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Friday, September 24th, 2010 AT 12:56 PM

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