Ok I dont know if this ghettofied engine harness has it still there or it was chopped off but .....

The primary o2 sensor from the exhaust ... could someone take a pic of the connector on the harness? ITs a 99 dx, with ex wire harness and I just cant find a plug that matches up and its causing the car to backfire/run rich. The helms says "4 gray" which doesnt help and shows spots where it could be and I dont seem to see it anywhere.

The o2 has the 4 wire, green/black, etc.. wires. and the connector looks like two H's connected in the middle

thanks in advance

 

ttt

 

bump.... do the connections differ from obd1 to obd2? I am certain the o2 is obd1 and the harness obd2

 

not sure either. but just look for some loose wires hanging or are tucked away

 

unfortunately there are about 10 of those at least and I think maybe it was clipped off, plugs are diff, etc..