1993 Ford Aerostar idle

1993 FORD AEROSTAR
161,000 MILES • 6 CYL • 2WD • AUTOMATIC
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INVENTION2009
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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
Jan 20, 2010 at 1:59 AM
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JACOBANDNICKOLAS
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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
Jan 23, 2010 at 11:01 PM
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