• Tiny
  • keirra
  • 2002 Ford Focus
  • 4 CYL
  • FWD
  • manual
  • 217,000 miles

Why when I turn the heat on in my car my car then wants to stall

Do you
have the same problem?
Wednesday, April 6th, 2011 AT 5:08 PM

1 Reply

  • Tiny
  • Wrenchtech
  • Expert
  • 20,403 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.

Was this
Wednesday, April 6th, 2011 AT 5:19 PM

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