Previously I had no issue starting my truck in cold weather but this morning is -16 C and it will not run. Starts and runs for 5 to 10 sec and dies.
So something different again.

 

Finally did you find the solution ?
My 2015 3.5L ecoboost starts 5 to 6 second and stall ...
Replaced fuel pump module, fuel pump and check wiring and still get the same issue. Thinking about ECM but it's very expensive .... and if it's not the issue it a lot of money loss !

 

My problem was in the wiring.
Had broken wire between computer and fuel pump module. One very thin wire I'd say gage 20 or 22 was broken in the loom below driver door. Loom is wraped and there is probably 10 or more wires in it wires in it. Ford dealership took 2 hours for troubleshooting and repairs.
I did the same. Replaced fuel pump module, fuel pump and rewired fuel pump fuse . When that didn't fix the problem i took it to the dealership and told them that it is wire broken somwhere but i didn't have any diagrams for it so they can find it. They fixed it and I was very happy that it was the wire not the ECM