2000 Dakota wont start.. filter problems?

My '00 Dakota won't start -sometimes-. Usually it's all right, except for the "Check Engine" light that's on since I start it (again, sometimes it is but sometimes it isn't). The key turns and it cranks and everything but sometimes it just won't start. I'm thinking it might be the fuel filter... any suggestions? Does anyone know where the fuel filter is located in this truck?

I'm thinking more of the fuel pump. It's located in the gas tank with the fuel filter. The best way to get at it, is remove the truck bed. I think it's like 6 bolts, and 2-3 guys should have no problems lifting it.