Barry Gardner wrote:

Paul,

You wrote: "Tracy uses the O2 sensor for setting up the system
initially. 100LL does it in
but it seems to recover somewhat when unleaded gas is burned for
awhile."

My understanding is that a heated (i.e. 3 wire) O2 sensor is more
tolerant of leaded fuel than the unheated one wire version. Also,
I read that Bosch has developed a European spec O2 sensor that is
okay with leaded fuel. I read a passing reference to it in a
magazine but the article didn't have any details or parts
numbers.

Barry Gardner
Wheaton, IL

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