Hey everyone, I recently swapped a z6 head onto my a6 block. It also has a comp zex cam with adjustable cam gear (if that matters). I converted it to obd1 with a p28 ecu and a four wire o2 sensor, and as far as I can tell all the wiring is fine. Anyway, I just finished the swap and the car runs great but as soon as it hits about 4100 rpm it hits rev limiter. I can't seem to figure out the problem. My dad is a Honda mechanic and he thinks there is something wrong with the z6 distributor, but I dont know yet. Has anyone ever had this problem!? Any help is greatly appreciated!