• Tiny
  • lonnie grey
  • 1992 Chevrolet Astro
  • 6 CYL
  • AWD
  • automatic
  • 89,000 miles

My 92 astro idles to fast

Friday, February 18th, 2011 AT 11:21 PM

1 Answer

  • Tiny
  • Wrenchtech
  • Expert
  • 19,808 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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Saturday, February 19th, 2011 AT 12:18 AM

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