2007 6.0 died at a stoplight, now no start

[fordinthefield]

SO i have an issue with my bone stock 2007 6.0 liter...stopped at one light, and i couldn't get it to accelerate until i revved it up in neutral, then put it back in drive and i was able to go. shortly after, (less than two miles), i stopped at another light and it just shut off. It will crank, and try to fire for about a second, then stops firing.

All this happened after four hours of steady highway driving, pulling a 7000 pound enclosed trailer at about 75 mph. I didn't overheat, no leaks noticeable, no odd smells or noises.

I got it towed to a shop in rapid city, south dakota called Rapid Diesel. I had to leave it there and rent a pickup to keep going, i work in the oilfield as a drilling consultant and was running behind to a well, so i had no other option but to get going.

An ideas about what is wrong, i need to know quick so i can get it fixed and back on the road, and to make sure this shop doesnt blow smoke up my ***.

Again, this is a bone stock 2007 6.0 liter, auto transmission, 64000 miles, 4x4 xlt.