I would start checking the wiring harness on top of the engine and where it drops over the heads in the rear for damage. The injector circuit codes would be my first target. Poor injector control or a bad injector(s) will cause misfires.
I would also check the actual running fuel pressure and look for vacuum leaks around the intake manifold. If you have access to a scope it would be a good idea to scope the ignition firing synced to the crank and cam sensors. I also doubt that it is a bad crank sensor. They are usually good or bad on that engine. No in between area.
When was the last time it had the plugs changed? The 4.7 uses common copper core plugs that need to be changed every 35,000 or so, they do not like any of the other high life types and will cause odd misfire patterns if they are used. The 3.7 is the same way.
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Tuesday, January 9th, 2018 AT 1:02 PM