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O2 Voltage Reading

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HPfreak

15+ Year Contributor
44
0
Jan 24, 2006
Jackson, New Jersey
Hey guys i have a 95 eclipse 420a turbo and i hooked up a safc according to the instructions on 2gnt.com with the blue wire mod and when i try to monitor the o2 voltage its reads aroung 1.5v. If i adjust the fuel curve in low throttle it does change. My question is why is it so high because on 2gnt.com's how to tune the safc says that it should be at 0.92v. I got the 1.5v reading with bothe the old o2 and a brand new bosch direct replacement o2. Thanks guys any help will be appreciated.
 
You should run 0 to 1 volt. Depending on the condition. Does the voltage fluctuate? If not, you have some other problem, maybe you hooked up the wrong wire. Do you have an air/fuel meter? If you are getting 1.5 volts at wide open throttle it is going pig rich.
 
I guess there was something wrong with the afc beause i disconnected the blue wire from the o2 signal wire and the afc still reads 1.5v and it fluctuates about +- .04 v
 
sorry but i used a volt meter to check the voltage ... i guess i should have done that from the beginning thanks for you help
 
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