P 0358 after changing plugs

Afternoon all, I just changed the spark plugs on my '04 4.7L GC, and after doing so, it threw a p 0358, any idea what could be causing this?

thanks,

Nevermind folks, I found the problem.

Apparently in my frustration with the design of the setup around the #8 plug, I forgot to reattach the coil wire.

Some days, I'd like to make the engineers who designed these solutions actually try to work on them, good grief what a pain.