[W126 Coupe] Hesitation from 60C to 80C

[Matt Jurcich]

Hey all,

My 89 560 SEC (110k or so) runs and shifts fine from cold until about 60C.
It starts to hesitate, tranny shifts way late (it's scary if you're on the
freeway and can't keep speed!) but then when the temp gets up to 80C
(running temp) the power comes back and shifting is normal.  Car is
completely fine until it cools off.

I changed the fuel pressure regulator, had my fuel filters changed at the
pumps about a year ago, tranny service a couple of years ago, changed plugs,
rotor and dist cap last year.

Any suggestions?  It seems like some temperature sensor that's flaking
out......

Thanks.

-m
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