I getting ready to convert from OBD0 to OBD1 (1st gen B16 to OBD1). I currently am using a PR3 ECU and the Hasport Wiring Harness to add the Oil Pressure Switch, VTEC Solenoid, Knock Sensor, and 2nd O2 sensor. I plan on getting the OBD0 to OBD1 conversion harness from Bloomslang and was wondering if I still have to use the Hasport harness for the added wires listed above.

 

When you convert to OBD1, you will no longer need the second O2, however you will need to convert to one 4 wire O2. You can still use the subharness for the VTEC solenoid + pressure, then depending on which ECU you use will determine whether or not you will need to wire up the knock sensor. There will be additional wiring on your part that neither the HASport subharness nor the ECU OBD1 jumper conversion harness will provide. You will have to do the 4 wire O2, rewire injectors, distributor, etc.