Taking the plunge: 5.4 Triton spark plug change

Thanks for the tips. I also bought a can of mass air flow sensor cleaner. Also due for engine coolant change and might do the transfer case and diffs while I'm at it. The list never ends, but I can't complain. I haven't really done much at all to it since new and it's always performed great for me. Get it all done and might get another 100K out of it.