Took my car out this morning and found when I accelerated hard the engine started stuttering and there was no power. Soon as boost started to build up it started doing this. Got my mates scanner on it and it came up misfire on cylinder 3 and coils 2 and 3 short to ground. I've replaced both coils and it seemed to have fixed the problem. Anyone had a problem like this? Just seems weird how the 2 coils just failed like that. I just serviced the car, oil, filter, genuine NGK TG spark plugs. Also did the air box mod. The car is remapped to 260hp and has forge dump valve with yellow spring. Recently switched to Tesco 99 momentum fuel.
