[bettlesr]

I think I may have found out why my car is frying the modules. I put my ocilloscope across the plus side of the coil to ground. My rotary fuel pump is also across the hot side of the coil, all other accessories are fed from a relay. When I shut off the ignition, the only thing connected to the coil is the pump. I get a fairly good size ac wave on the hot side until the pump stops spinning. This could be higher or lower voltage then the "points" lead to the coil negative. I am going to try connecting the fuel pump to the relay as well. Then when the ignition is shut off only the coil and the relay coil are on the hot side of the coil and module. Running out of spare modules!