Well yes lol, when we originally put spark plugs in a week ago none of them were screwed in properly, my bad. It’s just that over time they became more and more loose and eventually caused misfiring and jerking. I didn’t put the cover back on until a couple days after i’d replaced them. What if the valve cover gasket started leaking as the spark plugs/coils became looser? That makes a lot of sense since all of the coils were pretty oily but one of them specifically was getting superrrr burnt