You mentioned that when you pull #2 plug, it is wet. Can you tell if it is fuel wet or oil wet? Which ever one it is would give an indication as to where to concentrate the search. Also, I would do a leak down test, just to be sure that one of the valves wasn't the culprit.
Good point here-- I know where Dave is going with this. It may just need a new valve cover set. They come with the spark plug seals which are notorious for doing just this. $20.00 if thats the case.
Also, are these coil pack engines, or is there a single coil firing all the cylinders?
Since the compression was checked and is good, id rule out head gasket and or burnt valve.
GTX also makes a great point. If the injectors were swapped and it still is peeing in the cylinder, there's a signal coming from somewhere keeping the injector in a partial live state randomly. I wonder if theres a wire rubbed through on the injector harness....
