I've got a theory if you will. When i was replacing the phase sensor i noticed play in the dizzy shaft. My theory is that this will be likened to a wheel thats not balanced i.e. it only vibrates the car at a certain speed. Thus the dizzy shaft getting out of shape at the said 2100 rpm and the gap going haywire making the car cough and the ecu light come on. It's just a theory would anyone agree or is it just shite.