kirby 32

hi my p1 has a miss fire on it on number one cylinder, idel is ruf obviously . so ran the car un did the ht lead and no change at all , checked that lead with another plug and itwas sparking fine . i ten changed the plug still no change , then the injector and no change , any one any ideas . i also compression tested and seamed to be ok . could this be a mapping problem ??????? kirby 32

scoobyboy

probably melted the piston unless the injector has packed up but i doubt it

Mr_Wid

What compression did you get in all cylinders?

If the compressions good and everything you've mentioned bove is all ok, could it poss be the coil pack?