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ELECTRONIC IGN. 301 V-8 - Resistor needed?

From: Hank Dozier
Remote Name:
Date: October 09, 2002


Typically, the reason for the resistor in the system is to limit current through the coil at idle, and if the vehicle is stalled and left with the key in the "RUN" position with the points closed. With an electronic ignition, the second issue is not a problem, as the transistor circuitry takes care of the "stall dwell". However, the first issue IS still a problem. If the coil manufacturer specifies NO resistor, then you can delete it. If in doubt, try this test. Measure your old coil primary for its resistance. Do the same with your NEW coil. If the new coil has equal or lower resistance, you definitely need to leave the resistor in the circuit. If the new coil is appreciably HIGHER than the old coil (say 1.5 Ohm versus 0.7 Ohm), then you can consider deleting it, if the manufacturer does not indicate on the coil itself or instructions. Typically the ballast resistor in the ignition is about 0.5 Ohm as a reference.


Last changed: July 19, 2018