Get a new relay, they aren't that expensive (at least from FASTLANE, anyway).

Cures all sorts of ills, from intermittant stalling to rough idle....

The car will run fine with the jumper in there, but you will have to remove it each time you shut the engine off. Otherwise, the fuel pumps will run continuously. This won't hurt anything, but it will run the battery flat pretty quick.

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!