01 powerstroke won't start
 

I have an 01 7.3. I currently replaced the starter, water pump, cam sensor, glow plug relay, and batteries. As soon as I did that it fired right up, however I parked it and the next morning when I went out to start it again I had a crank no start kind of morning. Is there any way possible that I could've purchased a faulty cam sensor? I tested the glow plugs and they seem to be ok. I also hooked it up to a diagnostics computer and nothing popped up. The mods I have are the edge juice programmer, k&n intake and a 5" exhaust from the turbo back. I'm mind boggled by this issue so any input will help. Thanks in advance.