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.

What could b the cause of ......

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Old 04-24-2006, 05:59 PM
  #1  
91LXStang2727
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Default What could b the cause of ......

a rough idle? Besides a tune up. thx
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Old 04-24-2006, 06:00 PM
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5.0 MPG
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Default RE: What could b the cause of ......

pcv
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Old 04-24-2006, 06:09 PM
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ckyguy68
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Default RE: What could b the cause of ......

timing could be off, a vacuum leak, or 02 sensors could be the culprit.
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Old 04-24-2006, 07:50 PM
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88stangaruu
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Default RE: What could b the cause of ......

^^^ agree'd 02's. my idle smoothed out alot when i burned my 02's with a torch
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Old 04-24-2006, 07:52 PM
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grabbem88
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Default RE: What could b the cause of ......

meter could be dirty?
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Old 04-24-2006, 08:13 PM
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88stangaruu
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Default RE: What could b the cause of ......

^^^Lol the IAC gets dirty...it can cause all kinds of idle issues
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Old 04-24-2006, 08:21 PM
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Tims 88GT
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Default RE: What could b the cause of ......

every answer is good, but u could have a cracked dizzy cap or rotor. if u put new ones on that means nothing i have got a bad rotor before.
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