I didn't see any mention of you pulling codes. The $15 Radio Shack parts code tester is what I'm talking about.

If you'd have pulled the codes from the car, it would have told you WHICH of the three coil packs had gone bad. Not that replacing all 3 is a bad idea, but you can indeed pinpoint it down to the specific pair of cylinders that have the bad pack.

Cheers,
Gerry