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Hello, I'm totally confused on how I should get my RPM working through my MS3 main board in my 77' 280z. I'm using the Hall sensor off the negative side of the coil. However, I did the rookie mistake of installing both the section without points and the negative coil trigger at the same time. Even if I try the VR circuit only, I still don't get a tach signal. So I was wondering if anyone could tell me if I burned something out or destroyed the board, because no matter what I try it never produces a signal for the megasquirt main board. Thanks!