i have a rywire obd0-obd1 jumper harness, rywire obd0-obd1 distributor harness on a p28 because i want to convert to obd1 but prior to doing this i had a pr3 obd0 b16a ecu with the rywire vtec subharness, at this point the vtec subharness is still connected but i cant figure out what the other subconnector on the jumper harness is for? is it the same thing as the vtec subharness? any help is greatly appreciated

 

i would say yes...

 

there should be only 1 subharness coming from the jumper... it wires the vtec, o2 sensor, knock, etc. There are tones of wiring diagrams for this if you google it. Rywire even has it on their website for their jumper harness.