O2 sensors at WOT?

[Chris Conlon]

> > man's gas analyzer could be constructed using one heated (to measure O2) 
> > and one unheated to measure hydrocarbons, etc???
> 
> No.  What the report said (I read it) was that NO O2 sensor senses O2
> at the temperatures that they operate at.  They sense hydrocarbons
> only.  The temperature required for them to sense O2 was much higher
> than the O2 sensor in a normal exhaust stream was supposed to be

I had always heard, but never tested, that the O2 sensor reads *lean*
under conditions of a rich misfire, due to lots of O2 in the exhaust.
Sounds like this would be an easy test to see if the O2 sensor is
really responding to O2 or HC. Comments? Maybe I need to go yank off
a plug wire...

   Chris C.