Had same thing happen with p0305 and occasional 0303 and 1300 mixed in there. Changed out my upstream O2 on that bank and problem was gone. My coil pack has been floating around unbolted for awhile now so I thought along the same lines as you.

 

can you tell how did you make compression test? I will unplug or spark plugs and wires, pull out pump relay, but what to do with the ignition? Its too narrow and can not reach connectors to unplug them from coils without removing upper intake. how did you manage to turn off the ignition?

 

@ratijs: Ever figure this out? What was the problem?

 

You have the wrong plugs in the truck.
All these Bosch gimmick plugs with a small tip - junk.
Put in OEM plugs.

The plug you have in there is not burning hot enough.
It is black.

no wonder it misfires.

Misfires can also be caused by sticking valves.

 

Is it possible that the fuel injection system is at fault with higher ethanol in fuel causing rust
I would do a alcohol test. Just a thought

 

Engine compression test showed no leaks and compression was in good range for all cylinders. I think it might have been that on the cold start before the engine reached optimal temperature, I was accelerating too much and there was overload on engine causing misfires or it might have been fuel issue. Engine compression test is good way to start as it excludes many reasons for misfire.