I just need to hook up the o2 sensor. Ok well the sensor is in the downpipe that that the motor came with but its missing the grey clip ant the end ,all there is is the 4 wires with the pins at the end of the sensor. I have the diagram for my 92-95 category ecu pin out from this site already but before i start running wires and connecting i want to make sure that there is no ground wire that i need to know about since i guess these sensors have a heating up set up. So run the 4 wires straight to ecu and that's it? or do i need to ground anything so i don't end up frying stuff?

 

I would just get the terminal connector and repin it. it's really easy and will save you the trouble of tracing ecu pinouts and whatever else you're trying to do.

 

But to answer your question, the ground is included in the 4 wires.

 

why not just get another o2 plug thats obd1 and snap those wires into it? then depin your stock 02 plug wiresand snap em into the obd1 plug. instead of making the wires go straight to the ecu for no reason.

 

this^^^^^

 

The o2 sensor is a 4 wire obd1 but since my harness is a cx its only a 1 wire o2 sensor harness. I just found me a male clip to throw the sensor's pins back in. So can't i just get me a female clip with 4 wires and match them in the ecu to by pass the whole harness? Or do i need more than that?

 

You failed to mention your harness was a 1 wire o2. Yes, you will need to run the wiring and pin them into the ecu plug and the plug @ the sensor.

 

Ok cool cause i have extra wire and pins to make what i need and ill run all 4 straight to the ecu instead of messing with the mess of wires in the harness thanx!

 

just get an obd1 jumper harness instead of hacking wires yourself...unless your broke of course. then cut away i guess. IMO its just way easier to buy a jumper with the subharness already in place. DONE