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06-15-2005, 07:56 PM
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#3 |
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Moderator
Join Date: Sep 1998
Location: Grand Rapids, Michigan, USA
Posts: 1,001
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Re: Backfiring??
If you have the air injection reactor (air pump) system still on your car, replace the one-way check valves and check to see that the diverter and atmospheric dump valves are operating and properly connected. That or you're getting air introduced into the exhaust where and/or when it shouldn't be.
On the other hand, if you're leaning out, you need to check the fuel pressure while on a WOT run. Hope this helps. 
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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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