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 problems

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Old 09-05-2007, 09:26 PM
  #1  
CHILLERMAN
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Default idle problems

My problem only exists when the a/c is on. If you approach an intersection and gradually slow down while depressing the clutch. The engine will stall, unless you quickly tap the throttle. Turn the a/c off and the problem goes away. My mods are listed in my signature. I have no other drivability problems, and I have fixed all vacuum leaks. I currently have the idle speed set to 900 rpm and the IAC valve is new. The tps is set to .98 volts. I do not have a scanner yet, so I don't know if I have any codes or not. Other than this the car runs great.

This car was a speed density prior to the mods, but was converted to MAF. Thanks for any help.
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Old 09-05-2007, 10:34 PM
  #2  
Slimboyfatty
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Default RE: idle problems

did you check the MAF sensor. They can cause idle problems and such. Other than that I have no idea what could be the problem everything I would suggest has already been considered. Try just cleaning off your MAF sensor or replacing it.
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Old 09-05-2007, 11:48 PM
  #3  
ahittz24
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Default RE: idle problems

also the a/c wot relay will cause issues related to this its located in the pass fenderwell under your MAF sensor.
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Old 09-06-2007, 05:59 AM
  #4  
CHILLERMAN
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Default RE: idle problems

Thanks,

The MAF has already been cleaned to no avail. I will check the WOT relay.
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Old 09-06-2007, 08:14 AM
  #5  
Texas5.0
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Default RE: idle problems

The two things that I fixed when I was having that problem was the A/C WOT relay and the Vehicle Speed Sensor. It helped a lot but did not completely fix the problem for me becauseI had several intake leaks.
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