Barry
Thanks for the input. This shop that did the recalibration is a Bosch certified that the dealership has used since the 70's so I would hope what they did was correct.

I had the same thought as you that the pump element element when hot was not performing but: When they cracked the #5 cylinder line the fuel came out of the line as it should.

The injectors have been swapped around to see if there is a bad one in the mix but the issue stays with #5

Do you think that just driving it may loosen this up?

Any possibility that the #5 prechamber is clogged?

Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor