thanks for the help.fit genuine pug coil pack and plugs.cleared codes.it seems to run with out the hicups now. customer has car back tonight.could anybody tell me the voltage on the wires going to the coil pack from the ecu.and also is their a coulor of wire that reprasents a particular cylinder. as when testing the voltage this morning i had 2 that wre 10.04 volts. and 2 that were 12.98 volts.thanks again andrew.