Throw out the 222# on cylinder #8 and the remainder of the figures are within 5% of each other - acceptable values. The 222# figure is probably a result of some carbon buildup due to the fouled plug. Thinking back about 6-8 months, I would occasionally have misses on startup for about 15 seconds, then it would clear up. Now, the plug is just not firing at all. I have verified continuity of the wiring to the #8 ignition coil, so I suspect the DME. Do you have any ideas what might be causing the non-firing on #8 cylinder?