Plugs looked very lean.
There is no test port on the fuel rails.
Light oily residue(normal) in the intake runners. No heavy carbon buildup on the valve stems. No # 3 intake valves did look dry not lightly oiled like the others.
Tomorrow will tell

Update
 

Got it all back together. No help, car still has rough, no Idle when cold.
At wits end.
On the way to buy a gallon of gas and a book of matches

Is the CAT plugged? Using an IR thermometer you should see constant temps from front to back say 600 to 700 degree's if its only front loading temps at 800 to 900 degrees and its cold at the back end change the CAT.

That cylinder is letting coolant in, most likely through a passage developed by corrosion of the aluminum in the cylinder head. Nobody really treats having to change the coolant seriously. When you shut off the engine coolant under pressure is entering the cylinder. When you start the engine in the morning the coolant in the cylinder causes misfires until the coolant is blown out. When you've exhausted all your avenues and eventually remove the cylinder head, you'll see the corrosion.

Most of the time just resurfacing it will remove the corrosion. Trying to add images but it's not letting me. Just asks for a URL.

Azmotorhead, You have not replied since last year so I assume you fixed you engine problem. Am interested in finding out your results.