Any info would help. Its got a miss at idle, i've narrowed it down to the number 1 cyl. I can pull the plug wire off when running and it makes no change, but the other 3 if pulled 1 at a time make it want to die like it should. I took the plug out, replaced it. Still doing it, i pulled the injector plug for the num 1 cyl off when it was running and no change either. So is it a bad injector?