need to know what resistor you have and what coil you have.
I seriously dooubt you got a coil that claims it has an internal resistive element. coils today are simply produced with the correct diameter and length of the primary winding to produce the impedance requird ont he coil primary.
A coil like a napa IC14SB is 16$ and needs no external resistor.
how old is the ignition switch and how do the electrical connections look?
for a 12v system you want 3-3.5 ohms of primary resistance..
I personally would get rid of the power wasting resistor and get a real, native 12v coil like the IC14sb
soundguy
soundguy
:thumbsup: that's exactly what napa had sitting on the shelf {now on my tractor}. They said at one time they were very common but now they only need one once in awhile, but they still keep them.