E150 4.6 problem

[spareparts]

I'm trying to resurect the half ton van I have(03 E150, 4.6 auto), I'm either going to fix it and sell it or part it out like it sits. I've been messing with it for a while. I've eliminated several things, now I'm down to it missing on four cylinders(doing it from teh beginning). I don't know Fords curent cylinder numbers so I'll put it in boat terms. STB side back two cylinders are not hitting. POrt side center two are dead. New plugs, cleaned injectors, good fuel pressure. Got me baffled, something has these four cylinders tied together. I've had the coils off and the injectors out so many times, they have had to gotten mixed up, still the same four holes are dead. Any ideas?