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grand prix misfire

P

patrick 721

New member
i have 1997 pont gran prix gtp 3.8l supercharged and i have misfires on number 3 and 4 cylinders are yhere any known problems with this concern
 


Vac leak, bad O2 sensor/s, plugged fuel filter, bad cat, bad/leaky egr, plugs, wires, coils, fuel injectors, chipped pistons.
 
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