Missfire P0303
swap all Ignition components from Cyl. 3 to Cyl. 5 including injectors, push rods and rockers still have a miss fire on Cyl# 3 spark is good. power on injector
Good, compression on the same head is CYL1/155, CYL3/160, CYL5/155, CYL7/ 155
I'm going crazy please some one help this is on a Grand Prix 2006 GXP
Last edited by Rico-glez; Apr 22, 2015 at 12:48 PM.

