2002 f250 ran it out of diesel now it wont start?

Most diesels have a vacuum priming system just fill up the tank the more the faster it starts cuz of vacuum pressure, and some in the fuel filter helps alot too. I've ran out plenty of times cuz my gauge isn't accurate since i put a 50 gallon titan tank on it so yeah that should solve it, oh to activate the self-prime, just turn your switch on like you would for your glow plugs you should hear the vacuum pump under the hood. that should help you out and then keep it on for about 5 min and then try starting, and keep trying till it starts. goodluck and get a gerrycan and keep in the back of your truck.