Finally figured out my misfire problem
Ok to start, my truck is a 2007 Ford F150 5.4, the problem was that it missed under load (hard acceleration or in overdrive) the cel would flash but not stay on, so I borrowed a reader from a friend and got it to read as it was missing. The only code I could get from it was P0308 which is a misfire in cylinder 8. So I did everything I knew of to diagnose which component was the one causing the problem, moved the plug, moved the cop and moved the injector. After this I would still get the code P0308. After much searching on this site, other sites and trying numerous other fixes in vain I decided to take it to someone. But before I did I figured I would trying switching the cop and plug around again. Well I just so happened to pick cylinder 1 to swap the plug out with. When I pulled the cylinder one plug out and noticed that the tip was broke right away. I went and got a new plug, replaced it, test drove it and it had fixed the problem.
So basically my computer was trying to tell me there was a misfire in cylinder 8 (drivers side rear most cylinder, closest to steering wheel correct?) when it was actually in cylinder 1 (passenger side front most, closest to passenger side headlight correct). Has anyone heard of this before?
Maybe I'm wrong in reading where cylinder 8 is but I just wanted to post this in case anyone else is having the same problem I was.