Coil can cause misfire on 1 cylinder but because each of the 3 coils in the pack spark 2 spark plugs at the same time it is more likely to cause a 2 cylinder misfire.
Same with computer, you would have a double misfire.
65psi is the correct fuel pressure for 1999 and up Ranger
1998 and older used return line, fuel pressure on those was 35-40psi
But I doubt thats your problem since you have a specific miss, not random.
It could just be a bad spark plug, have you pulled them out and looked at them, checked the gap?
A spark plug can fire fine and then quit under load, not a common problem but not unheard of either.
As engine load goes up the spark plug requires more voltage to "jump the gap", if spark plug wire or the spark plug itself is dropping voltage then it quits firing until load is reduced.
That is why someone suggested changing the coil, it starts there, although coil packs are very reliable, I would have started at the other end and inspected plugs and wires.