The truck was sitting for about 2 with the two big wire harness connectors unplugged on the drivers side, truck started up and ran good then started surging running like crap. Changed the fuel filter and then it ran for a little bit and lost power now it won't run at all. I'm getting 9 codes like fuel rail pressure too high, lost communications with the FICM , fuel pressure regulator circut, glow plug heater circut, air intake heater circut. I'm guessing it's gotta be electical I just can't figure out what