I've switched the coils around to see if the coil pack was the issue. It was an issue but even replacing the bad coil with a new one hasn't cured my ills. I'm still only running on one cylinder no matter which coil I put where. My left (driver's side) cylinder is still not firing. I have spark now but with the engine at full throttle I can pull the left spark plug wire off and nothing changes at all. The rods look fine. The valves look decent but I need to check the seating to be sure. the original spark plug on that side was covered in carbon deposits but I've replaced both plugs for good measure.