I recently bought a 93 del sol with a d16y8 motor in it. My check engine light comes on 10 minutes after driving and it is running rich. I was told when I bought the car that the reason the CEL came on was because there was no knock sensor on the motor and the ECU is looking for one causing the light to turn on. What do I do to fix this? I read I need to install a knock sensor and run it to the ecu. I have no idea how to do the wiring. I wont pass emissions unless the light goes off. I'm not sure if my vtec is popping either @ 5500 RPMS. Some one please help! Thanks.