So I thought the rough running was a result of my loose negative battery bolt connection:
[Battery cable bolts loose - but it is more complicated than that]
But the rain here has been insane for the last month or so ever since it got hot and humid. I have noticed that every night the car sits out overnight in the pouring rain - when I go to start in the morning, it runs REALLY rough and misfires until later on when I make a lot of short trips. If it doesn’t rain overnight, it seems fine in the morning.
Is is safe to assume that moisture is somehow (and I really don’t see how) getting inside the ignition coil, plug wire connections or near the plugs?
The fun never stops. Every time I turn the key I don’t know what to expect anymore.