I have tried two different ballasts, last one is 1.5 ohms, two coils, and I have another new one to try tomorrow. The box has been changed to a new orange box, and that helped for a while but then the problem came back. I have also changed the ignition switch. The spark gets weaker as the car runs and gets warmed up. Once heat soaked it has so little voltage it can hardly be seen, and starts to cut out and then the motor dies. This is a whole new wiring system, and a new ignition switch. It is a universal type, not a replacement system. Any ideas on what the heck is going on?