2002 cummins 24 valve won't start
 

My daily driver is an '02 24 valve. A few months ago, I was running a lot of errands; lots of stop and go. The truck wouldn't start in the parking lot. The fuel pump would come on, but I couldn't even get it to turn over. I sat there for about a half hour, tried the key, and it fired right up. It happened again a few days ago and once again today. The only difference is that this time I messed around with some of the fuses. The "engine input" fuse has a bolt in it that was loose. I pushed down the fuse, turned the key, and off I went. I did this a few time and the truck was fine. Tried to tighten the bolt but it's stripped. I tried whacking on the fuse today and nothing is happening now. I've had the truck for about 3 months now. It is chipped, but that's about it. Haven't done anything to the truck except an oil change.