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.

why would it run so lean?

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Old 08-24-2013, 06:52 PM
  #11  
dawson1112
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Get that koer done and report back with the results, its gonna be the best diagnostic tool you have at the moment.
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Old 08-29-2013, 11:19 AM
  #12  
Turboskippy
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sorry its been a minute since my last post. its been over 100 outside when the car comes home. anyways, diagnostic tests were ran, here are the results. (also, put my friends old tps on, seems to have a little more power.)

KOEO- 91
KOER- 12 and 91
Cylinder balance test- 90/passed.
Cylinder ID- 6 cyl. (?) "how is this? the fox wasnt made with a 6 cyl."

so i know i need new o2's. and will assume code 12(idle to high) would be from running lean. whats up with 6 cyl ID? i have way less codes than i thought would be there, but ID'd as a 6 cyl is hurting my brain, and my feelings!
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