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.

Check Engine Light

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Old 12-15-2007, 12:23 AM
  #1  
gottahitit247
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Default Check Engine Light

I gotmy 1st car91 coupe 5.0...auto,140k miles just put a vortech S-trim on only doing bout 8lbs Boost, Flw Masters, 3.73s, downPipe, everything else pretty much stock.. I got my check engine light that keeps coming on and right back off . ill get on it for a minute it lights up than i let off and light goes away.. Tried putting the computer on it checking the codes but cant get a conection. Any one got an idea what it could possibly be help me out please thanks.. Video > http://videos.streetfire.net/video/7...9400bb4225.htm
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Old 12-15-2007, 12:25 AM
  #2  
mjr46
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Default RE: Check Engine Light

you need to run akoeo/koer test and blink the codes out if a scan tool won't pull them
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Old 12-15-2007, 06:55 AM
  #3  
Joel5.0
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Default RE: Check Engine Light

DIY KOEO/KOER/Cylinder Balance Self-Test
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