i have a 2002 gmc envoy slt, i have replaced the intake gasket and the manifold gasket, and the ignition coils and new spark plugs and still continue to get cylinder misfire, what am i doing wrong?
i have a 2002 gmc envoy slt, i have replaced the intake gasket and the manifold gasket, and the ignition coils and new spark plugs and still continue to get cylinder misfire, what am i doing wrong?
If its in more then 1 cylinder is could be a number of things, iv seen these motors have misfiring problems from fuel injectors, low compression, too bad wiring on the wiring harness right where your wiring harness and coil wires plug in back of the motor rt on top. A weak fuel pump or partially clogged fuel filter could also caused a mystery misfire
