Peter Dohm wrote:
I have been told that they slow down, but may not cease to work in the
absolute sense. In other works, they will become useless for the closed
loop control that an automotive ECM requires, but might remain quite useable
in the manner that a pilot might use them. As to a comparison between an O2
sensor and EGT, I just don't know; but I am quite curious.


Ed Anderson runs a rotary in his RV-6 and uses 100LL exclusively. This
is his experience. The O2 sensor is useless for driving an ECM, but
still responds faster than he can.

emissions) mixture--at least that is the impression which I received from
the limited litterature I read.


Do a Google search on Megasquirt (I just finished building one. Doing
the burn-in test right now). You'll get more data on how ECM, O2
sensors, electronic ignition, etc all work than you'll ever need to know.