for focus

2002 FORD FOCUS
217,000 MILES • 4 CYL • FWD • MANUAL
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KEIRRA
  • MEMBER
  • 1 POST
why when i turn the heat on in my car my car then wants to stall
Apr 6, 2011 at 5:08 PM
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WRENCHTECH
  • CAR REPAIR CONTRIBUTOR
  • 20,761 POSTS
It is probably engaging the A/C compressor as many cars do now when the heat is requested to remove moisture.


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.
Apr 6, 2011 at 5:19 PM
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