why is my #3 cylinder misfiring after replacement parts on 1999 Ford F-150

i replaced the plug, plug wire, and the coil pack and i still am getting a misfiring problem i have hooked it to the computer at the local shop and its stating it is the 3rd cylinder that is misfiring will someone help me i neeed to get this addressed before i fry the rings or anything else at that matter

Asked by for the 1999 Ford F-150