While it is possible that you have a cracked head or cracked cup, it is not the most common failure I have seen in this situation. More that likely an injector install issue. Did you install the injectors yourself? I have seen a couple times where when installed wrong the hold down backs off and the injector is loose in the bore. This is caused by oil left in the hold down bolt hole or improper torque. One way to help determine if this is the case before tearing down is to check for air in fuel while cranking which is pretty simple.
1. Remove the upper fuel filter and insure the stand pipe is covered in fuel.
2. Crank the engine but DO NOT USE THE KEY, big mess if you do plus truck will start
3. Watch for air bubble in the filter housing, if present you can isolate either bank to determine which side is causing the issue
I would do the above test and report back the findings.
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2011 Ram 3500 DRW 4x4, S369, mini max.
Totaled-2015 Chevrolet Silverado LTZ, LML CCSB 4x4
Sold-2003 F250 CCSB 4x4 24V-G56 DFI 7x0.10 sacs, Adrenaline, CAT turbo, #110 springs
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