Hey another problem maybe they are related.
I think I have air leaking into the fuel system at the old style hand pump. The clear line up to the big filter has a lot of air rising with the fuel (none in the first filter) (and I have ordered a new style pump to replace it. Could running the engine be pumping this extra air back through the fuel return line? I need a good explanation of the whole fuel system. Anyone got a link? (I have searched)

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Thanx,
Alberta Luthier
1983 300CD ('Stinky')155k miles, 2.47 diff, EGR removed, AAZ injectors with 265 nozzles from Sean,and vogtland lowering springs.
1984 300SD ('Old Blue')150k Klicks from Japan originally, came with rear head rests, no sunroof and never had an EGR