Hey guys, I have a 91 v6 and the wire for the o2 is missing. it has been cut or pulled out of the o2. I have another sensor, but I cannot find the wire to plug it into. can you help?

 

[IMG][/IMG]well, i can try...but i have a 305...but here is where it is on mine

 

The O2 wire comes out of the harness under the hood on the passenger side (US pass side). At the rear of the engine compartment. IIRC it is a dark color, black with a red stripe? The sensor mounts in the Y-pipe under the vehicle.

Note that some export models are for leaded fuel. In these vehicles GM cut the O2 sensor wire to prevent closed loop operation.

RBob.

 

shouldn't those cars running on leaded fuel be (relatively) easy to spot due to the absence of the cat convertor?

 

Actually I'm pretty sure it's a purple wire; should be hanging around by the back passenger side of the motor.

 

x2, with a white stripe. It comes out of the harness that runs down the back right side of the motor and goes to the starter. But they pull it out about halfway up.

 

y-pipe huh? thats really strange. thats where I thought it would be, but what, then, is in the passenger side manifold of my car. it looks just like an o2 with no lead coming out. what is this then?

 

someone may have put a 3.4 in, with 3.4 manifolds.

Any way you can take pics of it?

 

So 3.4's have the oxy sensor in one manifold?

Another possibility is that someone put a 3.4 manifold on his 3.1?

 

Both, 3.4 is a dual(left/right) setup.