O2 Volts

[Shannen Durphey]

soren wrote:
> 
> >>> Bruce, I don't know why you say this, if you douse the o2 sensor
> >>> with butane, you block out the o2, so it will read high, as in a
> >>> rich fuel mixture. (No o2 present).
> >>> All of your above sounds correct, and with all respect, the
> >>> exception of your conclusion...
> >>> BobR.
> >
> >>Is butane not a Hydro Carbon?.
> >>Bruce
> >
> >(I'm chuckle'ing to myself), you've a point there. I have
> >to head out to the garage, I have, lets see; propane, argon,
> >acytelene (sp!), I'll see about butane. I have to try some
> >things out here... (as Arnie would say, in that low, deep
> >voice, 'I'll be back').
> 
>     So go out, try the argon, and see how it compares to any of the HC gases
> and the pure O2 that Bruce tried earlier.  If the argon/O2 readings are the
> same, it is a HC sensor.  If the argon/HC readings are the same, it is an O2
> sensor.  Either way, it seems to me as if whichever gas actually produces
> voltage is the one it is sensing.
> 
> Soren
No, because exhaust is mixed gasses.  Varying the amounts of HC, CO,
CO2, and NOx don't affect the sensor. Only O2 quantity in relation to
the sensor's reference changes voltage.  TPS senses TP whether output
voltage increases or decreases with increased throttle angle.  Why do
you think an "inverted" output from the O2 sensor makes it a Not O2
sensor?
Shannen