Question is I have a B18B1 Engine and was wondering how could I tell if its obd-1 or obd-2? Is there anyway I could tell from looking at the engine or engine harness? I have the engine harness near me right now!!! I need to know so I know what ECU I need for my swap. If you guys could help me asap cause I may have a lead on an Obd-2 P75 if that is what I need.