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Where is the O2 sensor harness on 1991?

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Where is the O2 sensor harness on 1991?

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    Where is the O2 sensor harness on 1991?

    I have put a 92 header on my car and I am trying to figure out where the harness is so I can extend the wires for the O2 sensor the guy before me didnt have it hooked up so im trying to figure this out if you could help it would be great

    #2
    well first thing, 90-91 have a "single wire" O2 sensor (green) and its located in front of the engine

    2nd the 92-93 have a 4 wire O2 sensor that is located in the back (right around the oil filter).


    so i think you need an extension harness for the sensor.
    twist on your obd0 o2 sensor on the bottom of the header and extend it to the harness in the front. its probally about 2 1/2 feet long.

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