i have a '08 4.7 4+4 when trying to use passing gear on the freeway it runs rough and losses some power. all spark plugs have been changed recently and when this problem started i changed all the ignition coils and wires. the engine light is now on and stays on i checked the codes and it only says cylinder 2 and 7 are misfiring. any suggestions from here ?

 

Moved to correct section.

Recheck your work, make sure things are plugged in properly, and the coils are seated ON the plugs, not next to them......