Kirk Britt Posted September 19, 2014 Report Share Posted September 19, 2014 No one I've called has ever had this happen. My 04 GTP misfire under hard acceleration only cylinder one! I've replaced plugs, wires, injector, lower intake gaskets, supercharger plenum gasket. No change! Unhook the charger belt and it runs like a dream! I'm outta ideas! Anyone got ideas? All parts are OEM Genuine GM AC Delco parts Quote Link to comment Share on other sites More sharing options...
EGTGP Posted September 19, 2014 Report Share Posted September 19, 2014 No one I've called has ever had this happen. My 04 GTP misfire under hard acceleration only cylinder one! I've replaced plugs, wires, injector, lower intake gaskets, supercharger plenum gasket. No change! Unhook the charger belt and it runs like a dream! I'm outta ideas! Anyone got ideas? All parts are OEM Genuine GM AC Delco parts time for a compression test. Quote Link to comment Share on other sites More sharing options...
95 vert Posted September 19, 2014 Report Share Posted September 19, 2014 Mine had a misfire at 2500 rpm and above. Ran perfect otherwise. It was the ignition module Quote Link to comment Share on other sites More sharing options...
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