5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Idle problem

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Old 06-21-2007, 12:15 AM
  #1  
mattkoly
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Default Idle problem

Just recentlyI noticed that when i have the heater/AC on in any position besides "Floor" or "Off" my idle goes to nearly 1700 rpm then veryslowly works it's way down to around 900 or somtimes hangs indefinetly. when i have the Heater/AC on flooror offmy idle is just fine

With all that said, to me it does not sound like a TPSorMAF sensor issue.

Any suggestions as to why my idle would just hang?

94 Cobra
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Old 06-21-2007, 12:17 AM
  #2  
rcdblink716
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Default RE: Idle problem

Ummm........The computer is designed to raise the idle with the a/c on but it shouldn't stay so high. Could be a power steering pressure switch, but I doubt it. Dunno, maybe someone on here who is more knowledgeable than me can help u out.
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