2006 buick lucerne cxs 4.6 cylinder 7 misfire changed coil no fix, ordered injec on 2006 Buick Lucerne

2006 buick lucerne cxs 4.6 cylinder 7 misfire changed coil no fix, ordered injector, pulled injector wire no change in engine idle. pulled cylinder 1 injector wire substantial misfire noticed. if injctor does not fix is there a fuel computer or just ECU. any suggestions. thank you Chip

by in Jasper, GA on October 25, 2011
1 answer 1 comment
ANSWER by on October 25, 2011
i would start with a spark plug. basics, basics. Roy
COMMENT by on October 25, 2011
I REPLACED SPARK PLUG, COIL, INJECTOR, COULD IT BE THE ECU. IS CYLINDER # 7 BANK CLOSEST TO REAR OF CAR AND LAST CYLINDER CLOSEST TO TRANSMISSION