Hmmm. I don't know where I got the notion that this single wire O2
sensor could be substituted for the 3 wire version, but it has been
floating around in my head for a long time, just waiting for the time
when  the single wire unit would need to be installed. I got this single
wire Bosch unit  from one of our  list vendors about 2-3 years ago and
it's just been sitting there, awaiting it's time. And now everyone is
telling me that I have to stick with the three wire. Bummer! I
understood that you could maybe tie two of the wires off and connect the
last wire and it would work. But $40 is cheap enough, and for a 60,000
mile O2 sensor life that is like  $0.0006666/mile. Like I said.....Cheap
enough.

Ok, it makes sense so a three wire gets ordered Thursday.

But what about the brand new single wire unit that I now can't properly
use??

Well, I;m going to stick it into the exhaust port in a gas fired kiln,
connect it to a digital multimeter, and monitor the voltage. I will
manually open and close a damper to control oxygen flow into the kiln.
Plus voltage says the kiln environment is oxidation, Negative voltage
says the the kiln environment is reduction. Reduction environments (not
enough oxygen) force the fire to gets it's oxygen from the glazes on the
pots, turning the copper oxide glazes a wonderful red instead of the
copper green that occurs when there is plenty of oxygen. It will be an
interesting experiment.

Thanks, All.

John Rodgers
88 GL Driver

John Rodgers wrote:

> I am ready to install a new O2 sensor in my van, and it is a Bosch
> single wire type.
>
> Can anyone tell me how to wire this thing. There are three wires coming
> to the old sensor, which is a three wire sensor type.
>
> Thanks,
>
> John Rodgers
> 88 GL driver
>
>