Re: Misfire and backfire when hot
All this for plugs..made the assumption you threw a set in along time ago,porcelain insulators do fail. Press assembled plugs like the autolite were designed for a reason, the insulator is protected from expansion.Insulators secured by a nut like the 3X are vulnerable, the insulator nut can loosen over heat cycles,allowing the porcelain to expand beyond limit.
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