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5.0L (1979-1995) MustangTechnical 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.
clean ur MAF and make sure it is connected right first. also that 67 code will prob go away if you push the clutch in when you take the codes and that wont cause a CEL (i think) the code went away when i checked mine... but i still have the 31...