Hello everyone .. I have a problem with my bmw x5 e53 05 4.4i n62 .. That from a month ago there is misfire in cylinder 8,7,5,2 .. And after get the sysetm checked .. We found that ecu dosent give the injector any power .. So i changed the ecu and coded it .. Now only cylinder 6 and 3 have a misfire ., what i found that ecu give them an electric pulse and after 10 sec. The ecu read that misfire and prevent a pulses .. I tried to change the ignition coils and spark plugs .. But i think spark plugs arent good as they are not platinum .. I have checked the pcv valves all are good .. Please anyone help me ..