2001 Dodge 2500 ram van 318 v8?

i own a dodge ram van and cant get it started. Heres what happened, i put in fuel at a gas station then it ran for a minute after and than stalled out. For the past few days the "check gauges" light has been coming on. I can pour gas down the intake but i get no reaction from the motor, i think i might have a weak spark? i cant seem to get it to arch off the distributor, someone said cam position sensor? Any ideas would be great!