I recently changed a coil pack on an 01 expedition 5.4 Triton Eddie Bauer Edition so it should be similar.
Codes read cylinder misfire on x cylinder.
Vehicle runs rough and when you step on the gas it kinda hesitates/bucks a bit.
Before reading the codes I changed the oil, fuel filter, cleaned the K&N air filter, put in some injector cleaner, ran premium fuel through it, seafoamed it, and even changed all the plugs and plug boots.
I did all this as a tune up for the vehicle because it needed to be done and it still ran like crap. Finally I found a parts store that still carried a obdii code reader (all the others no longer read codes for free, even autozone), and found the misfire. Bought 1 coilpack, swapped it out, of course it was number 7 which was on the drivers side rear and the hardest to get to, and it felt like a new vehicle.