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Testing O2 sensors 850 1995

posted by  someone claiming to be 145volvowayne on  Wed Jul 30 17:01 CST 2008 [RELATED]

I tested both o2 sensors today. The front sensor seems to be responding as it should on the volt meter. The rear sensor will only give me .73 volts. I leaned the mixture by pulling a vacume hose and richened it my feeding propane to the engine. Should the rear o2 sensor respond with a change in voltage? Do you have a better way to test the sensors?

This is all because of poor MPG and the smell of a rich mixture at idle.

Thanks,
Wayne





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