Originally Posted by 88dx

Your wiring harness dose not have a knock sensor because your stock P28 ECU dose not use one. If you stay with the stock p28 you wont be able to use a knock sensor and its not a problem. If you get a P30 or a p72 that use a knock sensor you will have to get a pin out of the ecu and run a wire too the knock sensor. I would just run the P28 and not use the knock sensor.
steve