2000 Chevy 1500

Tiny
JOEY74
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 174,000 MILES
Hello I have a 2000 chevy z71 and with the truck in park the idle will flucuate from 500 to 1000 could it be a idle sensor going bad.
Tuesday, February 8th, 2011 AT 12:14 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
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Tuesday, February 8th, 2011 AT 1:01 AM

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