I think it's Alistair Bell on this list make a little gizmo that you
mount in the instrument pod and connect to the O2 sensor that gives and
continuous indication of operation of the O2 sensor. It not a counter,
but just a series of little indicator lights that when operating
properly moved rhythmically back and fourth. As long as it does, all is
will with the O2 sensor. If not - then no ocillation. On startup and
until the O2 sensor warms up to operating temperature, the lights will
wander eratically, but once up to temp, it will oscillate. A handy gadget.

JOhn

John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com

On 8/13/2011 10:46 AM, John Lauterbach wrote:
> First, thank you to one of the list gurus who suggested checking on
> shorts between O2-cable and its shield.  I had one of my own causing.
>
> When the O2-sensor is connected and I measure the voltage between the
> connector and engine ignition control module heat shield, I am getting
> around 0.46 volts with engine warmed up.  Voltage is rather stable with
> engine at idle.  Am I in the ballpark?
>
> With O2-cable unplugged, resistance between connector and ground on
> cable to O2-sensor is infinite.  Resistance between other connector and
> ground on cable to ECM is 173000 ohms.
>
> I am not sure what I am missing, but engine runs well, but is running
> very rich.
>
> John
>
>