ok, i agree with you on that but on the S1 engine with the triple coil pack each side of the coil pack goes to the oposite bank, so if it was a faulty coil would it not show on 2 cylinders on oposite banks fired by the same coil where as he states that the cylinder 2,4,6 fire ok where as 1,3,5 seem to be missing intermittently. i'll test my engine on sunday with an inductive timing light and see what results i get on my engine (i'll be at my regular job for the next 3 days). you have me on the "reverse current flow", the current flows in the same direction from the coil down the lead to the plug right, wheres the reverse current flow. each coil fires 2 cylinders at the same time, one "dead" cylinder which is on the exhaust stroke and the other which is on the regular spark cycle, the "charged" cylinder gets most of the current from the coil as the charged cylinder is much more difficult to "ignite" and is seen as a greater resistance by the plug and following ohms law draws most of the current.
ok, idea, get 2 inductive timing lights and have one on each side of the output coil and see if they both fire together. just one other thing, a blocked exhaust, maybe, before they join together so only effecting one bank. drop the y pipe at the first joint from the exhaust manifold on the bad side and see what happens, easy test, just use some earmuffs