2008 f-350 died with no warning, H&S tuned

[picknick15]

well yesterday my 6.4 died on my. I was pulling a dump trailer down the road when all of a sudden with no warning it just shut off. All temps fine nothing out of the ordinary. The truck still turns over but I get absolutely nothing as far as trying to start. It is H&S tunned so I looked at the DTC codes and there are 8 of them
P179A Unkown DTC
P0670 Glow Plug module control circuit
P0684 Glow plug control module to pcm communication circuit range/performance
P0691 Fan 1 Control circuit low
P0091 Fuel Pressure Regulator 1 control circuit Low
P0003 Fuel volume regulator control circuit low
P0101 Mass or Volume air flow circuit range/performance
P0000 Unknown DTC

Any ideas as to what it could be. I have to go today and put it back to stock before it gets towed to the ford dealership, but I was just wondering if anybody has had a problem like this before. I know I did once in my old 6.0 and it ended up being the HPOP

[NRHS Sales]

sounds like a fuel pump issue to me. when you put the DPF on also make sure you drain the water seperator at that time.

[DSL_PWR]

Could be the hpop, how many miles do you have on your truck?

[Sidewinder007]

It sounds so familiar to me my 08 did the same thing driving down the Hwy. It was the high pressure fuel pump!! And yes that would be a "cab off" repair... Sorry to hear about your luck. It took the shop about 2 weeks to repair. I was running SCT custom 575 tune when the fuel pump went. That was only the beginning of my break downs. My latest problem is a half stuck EGR valve. Not looking forward to putting exhaust back on for a problem I could have prevented with an EGR block off plate....BUT WAIT it could be something as simple as a pressure sensor located in the exhaust but with no fire to the engine I would have to go with the fuel pump....

[picknick15]

It has 51000 miles on it. Cab off sounds bad. has anybody had any problems with dealers finding tuners on the truck.

[Sidewinder007]

As long as you return the trucks PCM/TCM programs back to the stock configuration it is nearly impossible for FORD to be able to say for sure you had put any tuner on the truck. They "ford" say that they have a computer system that can tell if a truck has had its computer "tampered" with or re-tuned but I personally called them out on that deal when I had one of my turbos go bad. I recieved a call back from FORD reps. and they told me that the only way they could know would be to take the computer out of the truck and send it off to headquarters for someone to analyze the computer very very closely. They said that it was just not economical to attempt to do so on every truck that posed problems.

[greasltn]

It could be the HPFP, but it could also be as simple as the wiring harness for the HPFP. The harness is know to chafe and cause this problem, that is why they have an updated harness for it. The problem is, it is still a cab off job.