Is there power
You didn't mention whether you were getting power to the fuel pumps prior to starting and while the engine is running? Can you hear the pumps running to prime the line when you turn on the ignition key? Are the pumps still running after the enine stalls and won't restart? Let's start the troubleshooting their first. If the pumps aren't running, is there power going to the pumps? Put the voltmeter on the pump leads when you turn on the key and see if there is juice making it to the pump. Post your results and we'll go from there.
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan