What wiring harness should i use that would be the easiest. I have 2 99-00 harness both auto and i cant get them to work. I also have a obd2 p2t ecu and a obd1 p30 that came with the motor. What would be the best way to have the engine wired up. I have the motor in and everything ready to go but the harness and ecu.

 

Use your stock harness, wire in VTEC and get an OBDII-A ECU then you're done.

 

the car was a shell so i had to rebuild and get everything so i should get a 96 ex harness then? what kinda ecu should i run?

 

Run the 96 EX harness, then wire in knock sensor and it'll be fine on the motor. Either get an OBDII P30, a 96-97 P72 (You'll have IAB codes), 96-97 P73, or use the stock 96 EX ECU. If you want, you could get an OBDI jumper harness and it'll open up a whole new world of ECU's that you can use.