i looked to motor up and down and didn't see any extra sensor anywhere.... i was told that if i ground out the d3 pin it will prevent the cel from coming on and that was pretty much all i was looking to do about the knock sensor because whomever wired this up did the same thing to the vtec pins and i'm not sure its working... they just stuffed wires into the back of the harness and assumed it was making connection but when i took it apart i don't think they are and i'm not sure everything is working properly.... the car runs just fine other then it needing an alternator and an iac motor. its just i want this car to be right and have no problems. i have already gone through and redone the motor i just have to work out all the little kinks that it has... to tell you the truth i don't know a thing about chipping ecu's or wiring in things that weren't there before and by that matter i've never done a vtec into non vtec swap