Re: Are Model A coils polarity sensitive ??
some cars are very sensitive and others aren't. Like you I have just slapped the wires on for many years and they have worked fine on nearly all of my cars. Recently I was having a problem locating the reason for repeated spark plug fouling. I finally broke down and checked the polarity properly and discovered it was reversed. I corrected it and the fouling ended and I was one happy guy.
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