I have a older 1995 f-series 700, like the newer f-750's. It is a big pacific bell truck. the problem is it backfires thru exhaust on decel, very loud backfire like a gunshot. it has a 7.0l in it, ford i assume or catapillar. the exhaust smells like it is runn...

FIX posted 2/9/2005

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