An important piece of information would be whether this episode was accompanied by alot of exhaust smoke (the dark soot kind) or by no/minimal exhaust smoke.

No exhaust smoke would indicate a low fuel condition, lots of soot would indicate a lack of air. That would help narrow the likely suspects.

Perhaps the technician got the timing off on the pump.

Of course, it could be something else (like the transmission).

Jason Campbell

The Diesel part of the Family:
1984 760 GLE TD (x2)
1984 VW Jetta 1.9TD AAZ
1984 VW Rabbit 1.6TD
1981 VW Caddy 1.6D
1967 MB 200D