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.

Idling problem

Old 11-22-2007, 03:10 PM
  #11  
FivePointOhh
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Default RE: Idling problem

sorry to bring up a really old issue but this is what im dealing with now is a crappy idle when the motor is cold.

so if i unplug the iac and it makes no difference does that mean its bad? how do i check the map sensor and how does that effect idle when its cold? little more input would be great if you could, thanks!
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Old 11-22-2007, 08:45 PM
  #12  
89mustangfive0
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Default RE: Idling problem

is your car converted to mass air? if it is you aint got a map sensor.i had the same problem wit the idle as you, i changed my iac, cleaned mass air sensor, new tps at .98 changed the coolant temp sensor and it got better but it started idleing like crap untill some guy at the gas station made me pop my hood he touched the 2 10 pin connectors ( salt and pepper connecotrson the back of the intake) and the car idled mint. just move them around and see if the idle gets better
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