O2 sensor meter

[Kevin Rutledge]

At 09:08 AM 6/14/97 +0200, you wrote:
>I have made the EGO sensor meter for my car, but I have found that the
>voltage across LAMBDA sensor is not stable.
>I mean, when the engine is running at its minimum (about 800 RPM),
>the voltage go up and down around 0.5 V with a frequency about 3-5 Hz.
>Why?
>How can I connect your EGO sensor meter in order to have a stable value?
>

O2 sensor voltage is supposed to oscillate at idle. There is no way to
change this behavior.  If you mixture is set wrong (too rich, too lean)
then the voltage will stick to one end of the range.

Kevin Rutledge
Saab & Volvo technician