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Moderator
Join Date: Sep 1998
Location: Grand Rapids, Michigan, USA
Posts: 1,001
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![]() Check your fuel pressure. This sounds like a classic case of a failing fuel pump and/or regulator. Yes, leaning out causes backfiring.
Do a little Googling, and you can find out how to perform a cylinder balance test. All you need is a paper clip and about five minutes of your time. Good luck.
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Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco ![]() |
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