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High idle

Tiny
ERICLAMAR
  • MEMBER
  • 1994 PONTIAC FIREBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
1994 pontiac firebird 3.4 starts then idle go to about 6 grand map sensor plug is broke somebody please help
Sunday, April 24th, 2011 AT 5:05 PM

2 Replies

Tiny
SCCAIN
  • MEMBER
  • 4 POSTS
The first thang you need to do is fix your map sensor and look at all the cables then look at all of your vacum lines there could be a leake.
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Sunday, April 24th, 2011 AT 5:15 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
In addition to that info, 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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Sunday, April 24th, 2011 AT 6:48 PM

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