wire wheel FTW. If we end up having a mini meet this week i'll bring my multimeter and we can check your resistance on your coilpacks but chances are they just got some moisture in their. I know TaylorD'* do the same thing last time i talked to him.
Every 3800 engined car that I work on (6) has had at least one rusty coil post. Most times, cleaning them up takes care of it. Some, I've replaced because I didn't like the way the post looked after cleaning.