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.

surging idle?

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Old 01-12-2007, 03:51 AM
  #1  
302RideOrDie
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Default surging idle?

I start my car up and it goes to about 1,500 then back down to around 6-700 at idle, if i just let it sit there it surges to around 1,300 then back down to 6-700. I popped my hood to see if I could see anything and I noticed my engine revved up higher when a pulley came on, its the very bottom right hand pulley of which I think is the p/s. Anyway how can that come on and off when it's driven by a belt that's connected to all the pulleys, should it come on and off?
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Old 01-12-2007, 03:54 AM
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Edge_of_Sanity
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Default RE: surging idle?

the AC is the only thing that comes off and on, the compressor..
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Old 01-12-2007, 04:05 AM
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302RideOrDie
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Default RE: surging idle?

hmm, but why would that surge my idle?
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Old 01-12-2007, 10:09 AM
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7upedition
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Default RE: surging idle?

Fix your surgingidle by clickinghere .
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Old 01-12-2007, 12:03 PM
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ruger311
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+1 for 7up follow the directions and itll solve the problem
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