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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.
I took off the air silencer and cut off all the plastic leaving only a rim and the hold down clamps so the air filter will stay on. This allows more air, but now I get a check engine light. The car is still running fine and seems improved somewhat in acceleration. Should I be concerned with the check engine light?
Was this done with car running or battery connected? Its probably due to the MAF reading more air. Try to reset the computer by disconnecting battery for a few minutes.