Missfire issue

[Bmp87]

Got an 07 1500 4.7l v8 with a cylinder 8 missfire I can’t seem to figure out,I already changed out all my spark plugs and coil packs and it’s still missfiring looking for any suggestions on where to start

 

[jws123]

If your coil,plugs,injector tested good pull the valve cover sometimes they spit rocker arms from the small lifter getting gummed up also was the truck overheated at all recently? did you scan the truck what codes does it have?