Cranks but will not start

Originally started with it starting and running for a few seconds and shutting off. Replace spark plugs, distributor cap, mass air flow sensor, and a few other things I forget what. But we finally replaced the computer and after it blowing a fuse and need of a jump start it ran. I drove it back to my house and it ran fine other than if I pushed in the clutch it would idle so low it would shut off. Wednesday morning 6:30 I wake up and start the truck to make sure it starts I shut it off after letting it idle for a bit. 7:15 go to start it it turns over until the battery dies. I put the battery charger to go and leave for school with my friend. After school get home and go out to start truck turns over but will not start. I replaced all the fuses and it burped when I turned it over but now just cranks.