Pma capacitor ignition help

Thinking out loud .. It is important the ground from ignition is good and connects with minus on capacitor
Not sure about capacitor functionality but with battery I would consider connect the ignition ground at the minus on battery
Possibly the same here .
 
Perhaps needs to say more
These DC circuits are typically a high point 12-14 V and a low point 0 V
Speaking of battery the 12 V is on the + and 0 V on the minus -

The frame ground if everything is OK Is the same as - on the battery.
But if there is rust .lose connections . paint on the frame .. old wires and so on .. The frame ground is not as good as the Battery minus ground.
The ignition with + from the battery and - from the battery gives correct perfect physics .and error sources are taken out.
The + cannot be connected direct all the time ..because it can fry the coils and ignition. But I use it for fault finding .Just disconnect the + when
it is tested.
But Minus can as far as I know.

You did find a fault in the electronics perhaps it solves it and frame Ground is good and solid.
 
This was how pamco Pete originally wired up his pamco ignition
IMG_20250816_084033.jpg


He later upgraded the diagram, making the coil run off the live wire not be the conductor
CoilWiring_copy.jpg
 
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