I have a 97 f350 and i was taking off from a stop light one day and my truck started to miss and making a horrible banging sound from the ds valve cover. Well my buddy towed me home i put a scanner on it nd it said the #8 injector was bad so i changed it and looked over and tested my vavle cover harnesses and it still made the same noise and same dead miss. I also did a injector buzz test and it all passed fine im out of ideas and i will take any help i can get thanks.