- Of course there are always exceptions to the rule.
I believe any time you run points you will need a resistor somewhere in the voltage supply to the system regardless if it is internal to the coil or mounted externally, like mounted on the firewall.
- No if a coil has an internal resistor you would not add another resistor in the system, as long as you are supplying the correct voltage for the ECU's voltage rating.
Thanks! So a factory coil supplies about 7 volts WITH the firewall mounted resistor? And most coils with built-in resistors supplies about 9 volts? Is this right? And if so, will the extra 2 volts doom the ECU ? Thanks again
