Ok i know you guys know my car and its problems by now but ill update whats going on now. Ok i got a 91 civic hatch with a jdm zc dohc in it. Im having backfiring problems and my ECU is reading code 9 (number 1 cyl posi) I double checked the timing 3 times and actually just re did it to be sure. If i take the spark plug wire out of the number 1 it doesnt backfire at all just makes the car slow and sound like a lawnmower lol. Ok i know the wiring it correct from the dizzy and all that. And that sensor that also reads from code 9, when i unplug it while the car is running it makes no difference in the way the car sounds or idols. I checked the sensor to see if it had any power running through it and it does so its doing something maybe. I need some better input than what you guys keep telling me (timing and wire order) them 2 are not the problem now for sure. Please help.