OK... I think I'll be able to play around a little this weekend and crack some lines to start narrowing it down.

Yes, Running WVO. Which is why I suspect the injectors may have gotten a bit clogged, etc, from some polymerized oil.

Bill

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'87 300SDL, intensely modified Greasecar setup, with nickle plated heat exchanger, 3 valve setup, 312,000 miles
'95 Suburban diesel, Greasecar basics, 16 plate heat exchanger, mercedes fuel lines, Racor filter
'85 Renault Alliance converted full electric vehicle