1994 Volvo 940 Q&A
1994 Volvo 940 Question: Starts up but will cut off while driving, new battery; what is wrong?
Several things could cause this. I'd check the fuel pump relay first it's located behind the fuses. Also check the crank position sensor or reference sensor as Volvo calls it. That is behind the cylinder head, at the bell housing. You can start the car, let it idle and wiggle the cable from the crank sensor and see if it cuts off. It's a shielded cable and the insulation could brakes on it over time. If the problem happens only when the fuel level down to about 1/4 the connecting hose at the pre-pump in the fuel tank could be broken and won't supply fuel to the main pump, however the car would keep cutting off shortly after it started. Zee - ZeeTech