When my mechanic had my JPI installation half finished, I noticed in the
installation manual that JPI specified the star washer be _between_ the ring
terminal from the probe and the wire to the display. I thought that was
interesting and unusual. He had been putting them under the nut. After I
pointed that out, he made the remaining connections with the star washer
between the terminals. I've noticed no difference in operation so far.

Jon

"Dan Luke" wrote in message
...
"markjen" wrote:
I can't think of a scenario which would cause normal EGT, but
CHT 150 deg lower than normal. The engine runs normally.

I'm betting on Ron's #1 choice: a bad connection. First place to look
is the splice between the wire coming from the GEM and the lead coming
from the probe. These are often screw/star washer/ring terminal/nut
affairs that can become loose. They're usually in the engine compartment
covered by sleeves.
--
Dan
C172RG at BFM
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