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.

car running lean?

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Old 10-11-2007, 08:24 PM
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jeremy_04
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Default car running lean?

on my 94 5.0, i have two engine codes (bank 1 running lean) (bank 2 running lean) i also have an exhaust leak somewhere around the manifold, could that be throwing the o2 sensor off and causing it to run bad? wut about a bad iac?
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Old 10-11-2007, 08:25 PM
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PRO50SC
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Default RE: car running lean?

Most likely there is a vacuum leak somewhere and yes.
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