p0306 twice

[brianwhite]

Motor is under 100k almost everything is new. Threw the #6 misfire code 2 months ago replaced and it ran Fantastic. Just came back again with same code..maybe 3k later...any ideas guys...seems to get worse when hot but its just a feeling not a definite I did replace the plug when I did the cool pack

 

[FordandPolaris]

Switch the CoP to a different cylinder, reset the battery and computer, drive for a while. If the code comes up on the new cylinder, get the money back for the CoP. If it stays on the same cylinder, #6 from your post, check that the plug is gapped correctly (should be .054 or something like that. It says in the owners manual) and check that the fuel injector is functioning.