No, Mr. Lemmywinks, No!!!
Join Date: Jun 2005
Location: Harriman, TN
In your sig you state that you have a dorman intake manifold. I would suspect that a fuel injector or 2 may have been damaged during the install unless the manifold has always been on the car.
Your ECU could be causing an injector to hang open but that's not a common issue with the '96+ comapred to the '94/5.
Last but not least if one or more spark plugs isn't firing it too could cause the unburnt fuel to make its way through the valves and into the exhaust.
A lot of people here have had 97 eecs go bad; especially in the past couple of years. Too bad no one has posted their catch codes, so we could figure out whether or not it was limited to one group.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
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