That's pretty much what happened. I figured it was a spent plug. In changing them out I learn that the coil packs are also done and near done. I change those too and do some other maintenance type tasks and everything seems better than before this weekend.

And while I have your attention, are you familiar with a high pitched, metallic, sorta vibrating sound that occurs on acceleration but only around the 2 rpm area, and would seem to lessen or go away when it shifts to the next gear? It sounds like it comes from under the car rather than from the engine area.

I figured while I had someone with more knowledge than me reading my post, I'd try to describe this other thing. It doesn't seem like it's affecting the performance, but it sounds very cringy, is the best way to describe it, like it make me not want to step on the gas sometimes. :-)

Thanks for reading!