[George/Maine]

If a company sells coils and says no resister needed and your car runs go let it go.
coils topic never ends , people put them is backward use 6 volt coil on 12 volts, measure ohms. If you run a 6 volt coil with 12 volts do you run your car on rode?
If you use a 12 volt coil and resister say 1.5 ohms your current is low about 2 amps.
All testing should be running under correct operation.
If have a car worth 5,10,20,ect k use the best coil you can buy.
Bosch SU12 just for kicks put a amp meter in series and see what it reads running.My guess its less then 3 amps.