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Dropping my B18B1 into my 91 hatch and have most of the wiring harness all plugged in before I drop it on. I had a custom harness made by MonoTech converting to OBD1 and have this gray 4 pin connector on the back of the engine and I can't figure out what it connects to. Based on the length and placement, it should be somewhere back there. Wondering if I can tape it off for a sensor that I don't need or if I'll have issues without it being connected to something?
Good call! Thanks! Now I'm wondering if the O2 sensor is necessary on this OBD1 engine setup? I would assume so considering Monotech took the time to add the connector into the harness for me.
Good call! Thanks! Now I'm wondering if the O2 sensor is necessary on this OBD1 engine setup? I would assume so considering Monotech took the time to add the connector into the harness for me.
Mono Tech harness mystery connector
