Hello,
the adjustment I am refering to is the delivery valve. If you search milli volt or balance,cylinder balance or check Barrys post, I cant remember his last initial, you will find a ton of info on the subject. all you are doing is with the use of a dvom you check the voltage at the glow plug terminals with engine running and warmed up and glow plug wire harness unpluged from controller.
The now not energized glow plugs generate voltage consistant with the heat in the cylinders.

Oh yea, warm fuel, I also got it near St. Louis in '05 at a flying J on rt.55 and it to was about 75 degs. and the temps were in the 60's.
I recently read about it again in a different publication and it is still a concern for the truckers when the really worry about the bottom line.

Im going to google hot fuel and see what coms up.


Peter
1984 300d 274k