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94 Buick Lesabre

Tiny
JUICE1958
  • MEMBER
  • 1994 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
When I start it revs up and sometimes when you shut it off and restart it it runs fine what would cause this
Tuesday, April 19th, 2011 AT 11:39 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,867 POSTS
It's working like it's supposed to. What would you prefer it to do, not run fine?
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Wednesday, April 20th, 2011 AT 12:14 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 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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Wednesday, April 20th, 2011 AT 1:23 AM

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