my jeep is driving rough and stalling out, sometimes it wont crank at all?

we have tried the fuel filter and checked the spark plugs. it will still drive fine but all of a sudden it may just start stalling out and cut off and you cant crank it for a while when it does this. could this be a sensor.my jeep is a 2000 Cherokee Laredo 4.0.

Replace the fuel filter.Its the cheapest to do. if that doesnot help replace the fuel pump. or it could need a tune up which involves changing spark plugs and see if that helps.