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New heated O2 sensor smoking?

randy88k5

1/2 ton status
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Nov 8, 2004
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Location
Lynchburg, VA, USA
I installed a 3 wire oxygen sensor in place of the old single wire sensor. I also have a AutoMeter air/fuel ratio gauge installed. When I tested everyting out for the first time today, saw most things were working, some not, now its troubleshooting time.

First off I noticed the air/fuel gauge not working. I was going to check the wires later. I was checking the operation of other thiongs when my friend noticed the gauge started reading for a few seconds then cut back off. Another friend saw smoke comming from the o2 sensor. I immediately shut it off and jumped underneath, expecting to see burnt wires, but I didnt see anything out of the ordinary. I have never seen smoke from a sensor before.

I got a brand new ACDelco sensor with an ACDelco replacement connector. The purple wire originally on the car was spliced to the A/F gauge and the respectine wire of the connector. One of the other wires of the connector is to 12v, the other to ground. I have the 12v coming from a 3 amp fused ignition source. The o2 sensor is tight in the exhaust bung. I used anti-sieze on the threads, and the sensor is free of any oil or debris.

Is this correct?
Anyone else seen this before?
 
It sounds like you have it set up correctly. The smoke could be from some of the anti-seize grease burning off.
 
Hijack

Can I get a part number or location to get the connector?

Hijack over


I agree with op that it could be the anti-seize, or some residual stuff from manufacturing.
 
If Im looking at the correct reciept, the GM part number is 12126012. Ill post the ACDelco part number when I find the package. I paid around $25 dollars for it.

It looks to be the standard 3 pin connector, like for TPS and such. All three wires are gray, so I assume it fits multiple applications.
 
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