I have a 07 F150 4.2 and two days ago I ran out of gas and a friend brought me some gas in a 5 gallon can. I poured abought a gallon in my truck and it started right up. Went to a gas station down the road and put some more gas in. Was on my way home when the engine went dead while driving down the road. I would try to start it up and it would not start. I waited for a bit and it would start up and run fine. Drive for a few miles and in would do the same thing. It did that same thing all the way home. My friend told me later that when he stopped and put some gas in that can that it already had some gas in it. I can turn the switch off and wait a bit and it will start but if I leave the switch on which keeps pressure on the fuel system in will not start. I am thinking that it either sucked up some trash from the bottom of the tank or the gas my friend brought me had water in it. What are you ideas?

 

If you put only a gallon from his can and that got you to the gas station where you filled up I think you have other problems. If it had water in it I doubt you would have got it started.
if you are in doubt put a couples bottles of heet in.
one could argue that running it out of gas could damage the fuel pump because having it submerged in fuel is what cools it, but then again it could all be a coincidence.
How's the condition of your FPDM?

 

Symptoms sound like clogged fuel filter so I'd replace then run some fuel through back end of fuel line and make sure to keep tank above half for now on.

 

Ditto on FPDM
Is it possible that you thought you ran out of gas but the new stalling condition appeared and made you think it was out of gas?
Try this, is quick and easy.
Disconnect the fuel rail pressure sensor's vacuum line and see if gasoline drips out. If there is evidence of gas on the vacuum side the diaphragm has failed and you need a new fuel rail pressure sensor.