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With a fuel pressure gauge connected to the fuel rail.
Fuel pump pressure test.
Could be either. Start with replacing the filter then if it still has trouble do a fuel pump pressure and leak down test.
Fuel pressure test at the fuel rail.
Fuel Pump Pressure Test Look at the Related links below for help.
A fuel pump pressure test could determine the condition of the fuel pump and fuel system.
Start with a fuel pump pressure test.
Where is the fuel pump fuse and relay on 1994 BMW 525i and how can I test to see why my fuel pump won't work
With a fuel pressure test at the fuel rail.
Your losing spark or fuel. I would start with replacing the fuel filter. If it still dies do a fuel pressure test, it may have a failing fuel pump.
Fuel Pump fuse, relay, fuel filter, and all connections. A fuel pressure test will verify a defective fuel pump, or if it is simply not running, and has current to it.Fuel Pump fuse, relay, fuel filter, and all connections. A fuel pressure test will verify a defective fuel pump, or if it is simply not running, and has current to it.
Have a fuel pump pressure test done.