Mine recently went bad too. Was idling perfect in shop for a few minutes and suddenly cylinders #2 & #3 dropped out. Shutdown, restarted, still on two cyl's. Unplugged and replugged in red box, ran on all four cylinders for 15-20 minutes. Shutdown, came out next day same crap, running on only two cylinders. Investigated all including reseting triggers correctly, coil primary resistances, coil tower out resistances,wiring harness, etc. All was fine except for poorly crimped and installed plug wires into coils. Finally installed 6-7 year old Red box from our other car, ran 5 practics runs of 8-10 laps, ran perfect. Removed that Red box and installed on original car, now that car is down two cylinders when it ran perfect prior to swap. Looked closer at my box and found some discoloration on two of the terminals that looked like some sort of arcing(dark gray in color). Sent this box into Dynatek over a week ago and they reported yesterday that they cannot find anything wrong with it. So short of spending $285 for a new Red box, I am not sure what else to do. Warren Ropp(Iowa INEX dealer) bought a used car, started it in shop, idled great for a few minutes, and he suddenly lost two cylinders also. He fixed his with new Red box also. So, now we have four Red boxes within two weeks that have failed. I am seriously considering a stock ignition system as the Red box system does not seem be very reiliable.