Re: Grounding spark plugs

[vintin]

My understand is that it is not that the voltage has no place to go or that the voltage builds up…..neither is the real cause of the problem. The problem is that with no load the voltage in the secondary winding runs much higher than it does when loaded by the air gap in a spark and this high voltage can ‘punch’ through the insulation on the coper wire in the secondary winding. Once there is a path through the insulation the voltage will follow the path of least resistance and the coil is shot.