o2 sensor hook-up

[Gary Derian]

All you need is a high impedance volt meter.  When the sensor warms up, you
will get 200 mv lean and 800 mv rich.  The bias voltage is only for the ECM
to know what is happening.

Gary Derian <gderian at oh.verio.com>


> Hi guys,
>
> I just installed the o2 sensor in my exhaust for my efi conversion.  I
> don't have the ecu installed yet,  and it may be a couple of weeks before
I
> get a chance to install it.  In the mean time I'd like to hook it up to a
> display to see what the carb's doing to the a/f ratio.  I saw a posting a
> couple of weeks ago about supplying a .5V bias to the sensor.  Do I need
to
> do this to get a reading from the sensor?  What kind of a supply circuit
do
> I need? Or is the o2 sensor generating a voltage that I can just feed into
> the display?  I'm using the Intelitronix LED bar graph a/f ratio display
> from JC Ripme. Same circuit as floating around here, but it's packaged
real
> nice.  It's worth the $40 for the clean packaging, IMHO.
>
> Thanks,
>
> Bill
>