My 172 cup has developed a missfire at but it only does it when the car is warm and i go over 1/4 throttle, if im really gentle it runs fine it will sit happy at 80mph but as soon as i press the throttle over 1/4 the way down it runs on 3 cylinders, it also runs on 3 at idle, ive changed the coilpack and tdc sensor i havent checked the plugs as i cant see it being this and it has magnecor leads that aren't that old,
Im stumped on this one now and id really appreciate any new ideas
Im stumped on this one now and id really appreciate any new ideas