homemade air/fuel gauge...

[Ti Kan]

luke writes:
> anyone know much about o2 sensors?
> especially the oem bosch 3 wire unit in an mc?
> i plan on making my own air/fuel gauge with a
> multimeter...
> just wondering what wires read what
> and what reading the give off rich/stoich etc...

The white wires are for the heating element.  The black wire is
the output of the sensor.  The ground is the engine block.
Having said that, using a multimeter as a fuel/air gauge during
closed loop operation is going to be useless.  The signal varies
much too fast for most meters to register a correct reading.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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