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1993 Ford Aerostar idle

Tiny
INVENTION2009
  • MEMBER
  • 1993 FORD AEROSTAR
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 161,000 MILES
Hello I have a 1993 ford aerostar 3.0L. When my engine is running it idles fine. As soon as I turn my heater on to floor, vent, or defrost within a second or two my idle jumps from curb idle to high idle. This happens continuously as long as my heater is on. If I turn the heater off the idle is fine. (Ex. Up, down, up, down, updown etc.) I think it might be a electrical issue. Any suggestions would be great. Thanks
Abe
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Wednesday, January 20th, 2010 AT 1:59 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
The defroster turns on the AC which should increase the idle; however, your problem seems to be releated to the idle air control (IAC) or the throttle position sensor (TPS). Has the check engine light come on?

Let me know.

Joe
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Saturday, January 23rd, 2010 AT 11:01 PM

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