the o2 needs a reference voltage to start with. the reaction in the exhaust just makes the voltage change. the o2 itself doesn't generate voltage, otherwise, we might have a new power source.

ok, off annandale rd past 50. what was the name of that ice cream stand on the corner? go by on the way to 7 corners at any time and there was always a line, day or night. bunch of us used to hang out in a little bar at loehmans and run down there for a cone. closed a few years ago. pity. good luck, chuck.