[fastfredracing]

If it stored a misfire code, then you are golden, just pull the codes, and that will tell you which one is misfiring. If your scanner can watch live data, you can also pull up misfire data, and watch the counters . Some early ford trucks did not support this however, not sure what year it came on board, maybe 2003/4 ish?. You may have to brake torque the truck a little to simulate a load.
If you have a bad misfire such as the cylinder is dead, and you have a rough idle, you can find it the old school way, and just unplug each coil one at a time to see which one has the least affect on idle quality .
I find the early Fords without misfire data, to be the hardest to pinpoint an intermittent misfire under load . I have gone as far, as unbolting, and lifting l the coils, and using a light misting of water on all the boots, then out for a test drive to try to simulate the miss .