This car is driving me insane. Has a misfire that is being hard to find. The car has 95xxx miles on it. New dist, new plugs, new wires, egr ports and valve cleaned. Still seem to have a misfire on either number 2 or number 3 sometimes... I know that's vague but at a certain throttle position all the cylinders will fire and the car will pull until it requires more throttle and it starts missing again. Any ideas or comments on this one....?