About to replace the coil packs on a 2004 F150 4.6L, when I pulled number 1 and looked down there I see water residue around where the coil pack rests. Also just in front of that some standing water - that phrase sounds worse than it is, but it's obviously wet. The truck hasn't been driven in a few days if that matters.
Any ideas where this might be coming from? I'd like to make sure it isn't something terminal before I do the work to change these out.

thanks in advance...

coil pack hole



standing water