The shop found a bad crush washer in cylinder #4. Got it back and it runs great. I will be tearing the fuel pump out this weekend to clean and inspect it. Thanks for the input.
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2006 F-350 6.0L 4X4 AFE Intake, Banks Technicooler intercooler system, turbo back MBRP 4" exhaust, 70 Horse Depaco injectors, FICM and ECM/TCM Roll back, Gryphon programmer and Custom Tunes on the way 
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