cross you fingers and hope that code doesnt come back... did you try to move that coil around any? to see if the issue jumps? I had an issue with my throttle body position sensor and it was fun to limp it to the parts store to get the code read and fixed.
Also and a coil pack go out on me. I had accel coil look like it got bot/ black inside. replaced the coil pack and it works great. checked it a couple of times and no issue. i also replaced the plugs and wires while i was at it so i got most of the spark issue solved.