So, no takers yet? I just bought another brand new oxy sensor, same one, and
tested it. I got the same results. Any ideas on why this is? It still runs
fine with the sensor unplugged.

On Thu, Jul 28, 2011 at 7:27 AM, Peter Lapp
<carrothospital@googlemail.com>wrote:

> Hey all,
>
> I recently purchased and installed the stainless steel exhaust from Rocky
> Mountain Westy. I also got a brand new 3-wire oxy sensor to go with it.
> Well, I brought it out for it's first test ride afterwards and there was
> some weird hesitation and roaming idle. I took it home and thought that
> maybe I was an idiot and forgot to remove the plastic protective cap from
> the sensor before installing it. That doesn't seem to be the case now,
> because the cap covers the threads of the sensor too, and I know those
> weren't covered when I installed.
>
> If I unplug the sensor, it works great. If I plug it in, the hesitation is
> gone now, but the idle is not completely stable. It's not all over the
> place, but if you watch the needle, you can see it jump up and down just a
> hair. I hooked up a voltmeter to the signal wire with the heater wires
> connected. With the signal wire connected and the voltmeter on it, it will
> be at .45v, then if I give it gas, it will steadly climb. After I removed
> the gas and let it sit for a little idling, it started jumping between .1
> and .7v, which I think it what it's supposed to do.
> With the wire disconnected and a voltmeter on it, it would start at 0 volts
> and would climb indefinitely when I gave it gas. I'd have to try it again
> and check the numbers.
>
> Does anyone know how to correctly test the sensor? I figured maybe it could
> be defective. It's part #13957. If someone could help me get this figured
> out, it would be much appreciated. Maybe I had this issue all along, but my
> leaky exhaust hid it. Maybe now with a fully working exhaust it's just
> rearing it's head.
> Thanks a lot!
>
> -p
>