wierd o2 sensor readings

[USsil80]

well i have a power fc and it said for o2 voltage that i have 1.2-1.4 volts..... checked wires there right.... though they were only suppose to go from 0.1-1v ... this might explian alot...any help would great

[s13sr20chris]

yeah, with a zirconia type sensor you get .1-.9. if you happen to have a titania type sensor it will have the higher range. the reason is that a titania type operates off of a reference voltage from the ecm. im not sure if 240s ever came with the titania type but it is the only reason i can think of that you would have the higher voltage range.

[USsil80]

no it is a stock 87 300z o2 sensor..... this might be why i am runnign really rich

[s13sr20chris]

does it sweep from one extreme to the other or just stay at one voltage. over 1 volt is definately a prob other than just running rich. you cant run rich enough to make a zirconia sensor go to 1.2 volts.

[USsil80]

sweep...i may have a lose conetion but i have checked all the wires and everything is tight... and where you hook up by the battrie is getting steady voltage

[s13sr20chris]

well sweeping is good...you may want to try checking at the sensor. buy some t-pins from a sewing supply store(my wife buys mine from "joanns fabrics". stick them in the back of the connector to monitor the voltage while running(and driving).