Open up the fuel filter housing to see if there is fuel in there. If so then drain out what fuel is in there and try and see if you can pump fresh fuel in there. If its gelled then its not going to fill very well. If it isn't then it should fill pretty quick. Do you get much white smoke coming out of the truck while cranking it? Also how are your batteries? It requires alot of juice to get these engines to fire and if the batteries done have quite enough then its not going to go, because the injectors need a minimum voltage sent to the IDM to fire. This time of year its essential to carry some fuel conditioner/anti gell. Myself I run Power Service since its readily available at Napa and Shopper's Supply here. I typically have between 1-2 96oz bottles in the tool box along with the 5 gallons of oil and half a dozen different filters.
99 F250 PSD 4x4, 5" DIY exhaust, CCV mod, DIY intake, PMT1 with DP Tuner chip (stock/40/80/120), BTS VB, Suncoast Extreme Trans with SD43 converter, FASS fuel system.
Trail Rig: 95 Ranger on Kingpin D60/14 bolt/D&D Doubler.