My truck just started missing, seems to miss more the longer I drive it. Most likely it is a burnt plugwire, but want to make finding the problem as painless as possible. I did a search for this particular problem and couldn't find anything. Here is where I need help. It's not throwing any codes and when I log missfires while driving around it's not shown any missfires at all. Why isn't it showing which cylinder is not firing?

Thanks for any help

 

Problem fixed! Ended up being a burt plugwire, no big deal. Still haven't figured out why I can't log misfires.