Hey mate, this is your lucky day. I had exactly the same problem as yours. I have a 94 r33, When I bought my Pfc we could not get the car to start. But with the standard comp, the car started with no probs. The thing is your car is running on diagnostic mode. Meaning that someone put it on diagnostic mode and did not re-wire it back to normal mode. Take your car to someone who knows how to wire the comp and try fitting on the Pfc after wiring it back to normal mode. It should start straight away.