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Old 01-02-2004, 11:27 AM
xp190 xp190 is offline
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Join Date: Oct 2002
Location: Toronto, Canada
Posts: 700

I thought it was the O2 also, when I unplug the O2 the voltage goes back to 4.0V when the car is warmed up. Checked the wireing also and everything is fine.

When I ground the O2 connector the voltage goes to 0V so everything works the way it should.

Also once I unplug the O2 and plug it back in the voltage drops to 4 and slowly climbs up to 7.22V, I can't get it to stop anywhere before that.

I'll try a different O2, this one is relatively new but it could be bad.

Anything else I could try?

1985 190E 2.3L - a constant project.
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