had heads re surfaced, by our local machine shop. guys good. said no cracks. ngk plugs. replaced the miss fire one. no change. tore off intake tonight. moved injector. see if the miss moves. pulled all coils out one at a time. still plugged in nto harness, and put old plug in to see if there was...
i have 1997 t-100 3.4l, recently blew head gasket. had both heads done. put back together. has miss #3 cylinder. replaced plugs and wires. move coils around. checked for vacuum leaks. still says missfire on #3 cylinder