Hello. I hope someone can help with this as it's beginning to drive me crazy. My car is a 1990 300te-24. It has a repetitive cutting out like a crazy misfire on change up or change down at high revs. So if I boot it through the gears it pulls fine until it changes gear then there is a repetitive misfire unless I ease off the throttle then it will pull fine again until it changes up again. It also does the same if on high speed kick down. Does anybody have any ideas please?