Sorry this does not make sense
What EXACTLY is your test set up and how EXACTLY did you go about this?
Step by step you did what? You rigged a test gap at the coil wire? Did you use the coil wire or a different wire?
You cranked the engine by doing what?
What voltages did you check and how, exactly, when cranking?
Tell you what you must be 3? hours from me? I'm in N end of Idaho. If you want to call when you can get out there --does not have to be today--send me a PM and we'll set it up.
