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Clogged fuel filters comes to mind, but what does the smoke look like? If it were older, I'd say you have a vac pump problem, but by 83 the vac pump exhausts into the crankcase and you cannot blow oil into the intake anymore.
I'd also check the EGR valve to make sure it isn't sticking open -- this will cause serious black smoke, a funny muffled rattling, and poor power until you get the engine revs up. My Volvo used to black out whole lanes of traffic before I disconnected it.
Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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