So I am a bit confused with this issue. My truck started fine after a 9 day vacation. It ran fine for about 30 miles then stumbled and died. The dash lights all stay on so I don't think it is the ignition.

After the stall it will not start. I have replace the fuel filter, and confirmed there is fuel to the "t" valve. I have checked ground location and that the FSS clicks with the key turning on. The LP is pumping away also when the key is turned on.

I was able to get to started after cracking the #1 injector line to see if diesel was pumping the the engine is turning over. very little diesel came out, and the truck started after I reconnected the injector line. It then died again on the way to get some more diesel. I was able to restart by cracking the injector and reconnecting it.

Could this be an IP issue or fuel return blockage?
Any advice would be great....