O2 sensor questions

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brrian

Master Mechanic
Jul 7, 2022
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Pittsburgh, PA
1981 GP, 3.8L V6. See the images below. I think this is my O2 sensor... a set of wires, orange & purple, to something that looks like a spark plug boot. It's tucked way up on the passenger side manifold, up above the starter. Is that it?
The orange & purple wires run from it to a connector under my AC components, then to another connector (pictured). From there, 4 orange wires run into the large wire loom.

Is this all correct? I'm taking my car for inspection & might ask them to change the O2 sensor... it looks impossible without a lift. I'd like to buy the O2 sensor & take it with me. I see one-wire and two-wire versions, both listed as correct for my car. I want to make sure I take the right thing & that I know what all the rest of this is, correct or not.

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I'm not sure. Long story short, I'm running rich and don't know why yet. Since it's a piece of the puzzle and hard to get to, if I can get it changed cheaply I might go ahead and do it.
 
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