Who Can Diagnose THIS Total Mystery? Win A Prize?

[P.S.]

Originally Posted by RichPA

Sorry to dispute, but a coil needs no ground, the primary circuit goes in and out of the coil and the secondary circuit goes to ground after jumping the plug gap. It will operate fine hanging in mid air.

Technically, it does. If the coil is connected properly, the DC ground is normally found through the points. The "RF ground" (the high tension ground) is through the condenser (capacitor).

However, reading through all the posts again, I thought it could be a condition of coil not finding ground after heat/vibration. Suggesting the ground trick was "thinking outside the box" as mentioned. Have found that cleaning up the ground on the coil in my Tudor solved an bizzarre unexplainable problem where the car would miss for no good reason after it got good and hot.

I see a lot of people posting to this thread now have not taken the time to read through the whole thing, but I have. Trying to come up with something new to try that has worked before.