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i can not see why this will attribute to better grounding and less problems. Maybe i'm missing something.
You are right on. Ive spent a lot of time diagnosing the ignition circuit and have done the same test you did. Not only is the coil itself not grounded, but none of the wires are connected directly to ground either. That happens through the ecm. People that claim running a wire to the bolt on the coil helped with something are incorrect. Ive read that too and even passed it on to people. After looking at the circuit and doing the same continuity test that you did I realized that I passed that information mistakenly in the past. My problem ended up being the ecm but thats not where you are going with this.