It really shouldn't matter as everyone else has said, they won't ground out unless the are grounded through the ECU. Think about why I burnt mine. I didnt have the spark inverted so they were always grounded until they recieved the signal and turned them off, cause thats how traditional points work. The plugs fire when the points disconnect. It really isnt too much of a concern. I know that our coils are not powered through the fuel pump relay because the fuel pump relay turns off if the car doesnt start within a couple of seconds and the coils will continue to fire, i did some tests before i tore the OBD-1 off. My entire problem was due to mis configuration of megatune, not to wiring problems.