[Don Eckel 111]

I've had a couple of these annoying instances over the years during which we seemed to change everything electronic under the sun. The first, as stated above, was a bad over rev RPM chip. The second was a little more odd. As it turns out a small water circulating pump we use had to be changed a week prior to a miss that developed. Apparently the windings in this particular pump were different. We eventually found it on the suggestion of putting an MSD tester on the car and turning every switch in the car on and off, 1 at a time. When we hit the water pump, the tester went nuts. I had several of these pumps on the car before without a problem. So give the tester a try, you might save some serious headaches.