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O2 Sensor sees a lean mixture 700 1991

posted by  ibs740 on  Fri Oct 9 00:45 CST 2009
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last visit: Fri Oct 24 10:01 CST 2014
[RELATED]

"Force/fake Rich: Hold green ECU lead terminal in one hand while putting the other on battery + terminal. [No danger here. The +12vdc potential is harmlessly transmitted to the green lead terminal.] Sensor output should go low as ECU goes lean, and motor may even stall out."


Bruce can you clarify again what goes where? There is a green wire from the O2 sensor to the ECU. It is connected to the O2 sensor via standard male/female solderless terminals.

If the disconnected terminal from the O2 sensor is put on the battery how is any signal transmitted to the ECU because the sensor wire has been disconnected?

I'm confused.

Thanks





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