2004 just changed the plugs and now I have a misfire. I also change the wires as well I did them one at a time so I put them all back correctly they are the correct spark plugs and wires so that's not the problem. I did not use anti-seize when I put the plugs in it however I did use a very small amount of penetrating lubrication on the threads before I put them back in. Would that have anything to do with the misfire it was a very small amount yet it was an amount. Someone else mentioned...

Misfiring after spark plug change