1993 Volvo 960

Engine Performance problem
1993 Volvo 960 6 cyl Automatic

Volvo 960 (1993) car stalls while drivingc but will start again after a couple of minutes. I changed the fuel filter, fuel pressure regulator, same problem. There is this sound clicking sound (like when you touch two electric wires or like connecting battery cables and touching them) just before it stalls. Once you hear that clicking you know that within a few minutes the engine will stall. This sound is coming from beyond where the radio/cigarette is located.

What is causing this and what is the remedy. Thanks
February 2, 2010.

Maybe Fuel Inj System Relay droping out see diagram

Feb 2, 2010.