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To the gentleman with #3 cylinder running 30 degrees hotter than the others --

I had a thought the other day, relative to changing probes.  I suspect that
the temperature probe is a simple thermocouple -- they either work or they
don't.  Inaccuracies would come from the amplifier in your electronics box
rather than the probe itself.  Switching the probes wouldn't necessarily tell
you if the 30 degree offset is real or artificial unless you switch the
amplifier channels as well.

In other words, when you want to change probes to see if the problem is real
or an artifact of the probe, don't just unplug the wires and swap probes.  
Swap the wires, too.  So you'll have the old #3 probe and wire on #1, and the
old #1 probe and wire on #3.  Your display will be wrong -- what's listed as
#1 will actually be #3, and vice versa.

If the 30 degree offset migrates to the other cylinder, your problem is
solved.  Rather, you have a new problem -- which one is right?  (This could
probably be addressed by putting the probes in boiling water and reading
which one said it was 212 F)

- Rob Wolf
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