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Oxygen Sensor Tips?????????? 200

posted by  gadfly151 on  Sun Jun 27 08:22 CST 2004
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last visit: Thu Mar 5 05:47 CST 2009
[RELATED]

I am attempting to run down a rich running condition on a 1991 245 and I need some advice before I condemn the ECU enrichment circuit. I have done a battery of tests and replacements on this car which I will spare you the deatils of. My question is if a faulty O2 sensor can cause an excessively rich condition(soaked plugs, no power, excessive fuel consumption, backfiring, etc). I suspect that the engine is not running full rich due to disabling the AMM which made it run even richer. This is the last thing I can do before sending off the ECU for a rebuild. As a last note, I checked the O2 sensor but it seemed to dwell around .9v which I believe is at the top of the spec. It is my understanding that there should be a cycling action with changing fuel/air mixture. Lastly, any tips on a suitable tool for removal of the sensor?As usual, thanks for the input...
--
1991 245 130k-(Volvo number 4)






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