i swapped coils ended up don't know why but bought 4 new plugs even though i swapped with #2 the new plugs have all cylnder's firing,plus i took the crappy ass boots off the accell plug wires and put the stock ends on the accell wires,now back to square 1,after 5 minutes of idling the plugs are sooted black,back to the diagram again,runs great till plugs foul after about 50 miles