I've was just driving last week and then my ignition had a spasm and it's been happening repeatedly since. I was just driving and it seems like it works normally when accelerating and idling but when driving at a steady speed in the 1200-2200rpm range (cruising speed), the ignition goes haywire. I feels like it just consistently stops firing the same cylinder and it just shakes a little bit and I can feel the loss of some power. They way I know it has something to do with the ignition is because my tachometer runs off of the coil and when it starts doing this, my tach drops 1/6 or the rpm it's actually going. Technically since the car is still engaged and going the same speed, the engine is still spinning the same rpm but the tach isn't getting the correct amount of firing signals so it reads lower than it actually is. I've already unplugged and replugged all of the wires on both ends and taken off the dist. cap to make sure everything is connected correctly. Any ideas?