I have 4 Carrera Pro-X DTM cars that I have chipped with Scorpius chips. 3 of the cars count laps flawlessly and the 4th is not consistent at all. So I removed a chip from a car that works and put it into the car that didn't but still no luck. I thought that since I didn't ground any chips to the motor can, that maybe this car needed that done. I did that, but still doesn't work. I took the chip out and put it back in the working car I got it from and it again works fine. I measured to be sure all my sensor holes are all right and every car has it in the exact same position. Has anyone run into this problem before? Any ideas? When the car is travelling slow over the start/finish LB it counts fine, but anything even close to full speed doesn't work. The other cars are also faster and they work fine. Oh, and I tried different controllers and that made no difference either.