Just to said thanks to the few gus that help me....with yours comments...thanks finally my z start.. Bad injectors!!! Just couple questions....if I put the wrong connection like the plugs for the coils example...plug 1 in the coil #2...I'm gonna get missed fire....and of course not good pressure oil? How can I check which one is the rite connector for the coils....NOTE my harness is to old....so a bought just the plugs kit and ofcourse I lost the numbers... lol... Any one can help thanks anyway!!!!