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.

damn check engine light .

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Old 02-02-2009, 01:13 AM
  #1  
j3rry
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Default damn check engine light .

this thing is startin to drive me crazy . all my fluids are good . if drive car easy the light will never come on . but if im giving it hell its instantly coming on but the car still runs great with no problems at all . any body no bout what it could may be ? and also my batt light is always on till i get at higher rpm's but the car has a smaller belt on it cuz has ac elimenater kit on it and dont have smog pump could that cause the batt light to keep coming on ?
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Old 02-02-2009, 02:14 AM
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Catchpole
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Originally Posted by j3rry
this thing is startin to drive me crazy . all my fluids are good . if drive car easy the light will never come on . but if im giving it hell its instantly coming on but the car still runs great with no problems at all . any body no bout what it could may be ? and also my batt light is always on till i get at higher rpm's but the car has a smaller belt on it cuz has ac elimenater kit on it and dont have smog pump could that cause the batt light to keep coming on ?
For the batt light do you have UDP's?


And as for the engine light, mine did something similar and it was just my midpipe not being bolted down tight enough giving more oxygen to to o2 sensors giving off a lean condition read.
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Old 02-02-2009, 05:38 AM
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Joel5.0
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Run the DIY KOEO/KOER self tests ... LUK
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