I just noticed that the previous owner of the car never had the o2 plugged in. The O2 Sensor is the with the wire, i just cant seem to find the plug to the ECU. Air Box was removed so i can see the wiring harness. Where is it?

 

I know bumps arent aloud but the suns goin down Is the wire a shielded gray wire with a black one inside?

 

http://www.teamfc3s.org/main/factory..._non_turbo.pdf

page 3

 

The wire is where the bac is.

 

Mine (86 N/A) plugs up under the UIM near-ish the primary injectors. It's a green single spade, round, connector.