Hey guys I'm in need of some help. Buddy of mine has a 2003 6.0 with 180ish on the odometer. Truck surged then died on the way home one day. No restart. Hooked up fuel pressure gauge, read 0. He's changed the pump, filters, and upgraded to the blue spring in the regular. Started it up, let it idle. Pressure read 30psi. Died after about 20 minutes idling. I came over today, to try and help. Cycled the fuel pump about 3 times before attempting to start it. Finally fired up after about 4 tries. Sounded normal at idle, mechanical gauge read 12-14 psi on the regulator. Rented a code reader from Autozone, it said "no codes found". I find it hard to believe. Anyway, it idled for about 10 minutes, then started surging a bit, then idled fine again, then died a few minutes later. That's where I'm at. I know that pressure is low. Any ideas on where to start? Anything would be appreciated!