yes, but so could the fuel pump (low pressure). the only way to tell is to measure the pressure and pressure differential between the top and bottom of the distributor.

I personally suspect the fuel pump is low on output (do you have twin pumps or a single one?).

Again, a pressure and flow test is what you need to do next, you are getting to the expensive stuff.

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!