99 dodge 1500 conversion van

Visited son in Ct he drove my van filled up @ gas station another vehicle car
didn't start there after refueling he drove around parked van next day we were
ready to go home 2 Nj but my van would only crank no start so he drove us
home nxt day he took my van 2 his mechanic who said it appears fuel pump
fine they put 2 bottles heat in to discourse any water I took train up 5 hrs picked
up van ran gd till I was in middle of GWB. MY van stopped had 2 be towed off
then home after sitting overnite started up I went 2 miles dwn street to get part
4 wife's car van shut off again had to leave overnite van started up drove home
I can go a few miles then it shuts dwn like it runs out of gas but fuel pump
tested well within margins I'm handicapped unable 2 walk don't want 2 get
stranded any ideas ? On wchat it could be drain tank put new fuel in or do the
battery thing  Ty