Plugs are tapped at the factory for that specific plug, any change will cause problems. The gap is set by the plug type not the engine if the engine specs say different then you have the wrong plug. Find out which plug is correct for the engine and leave the gap alone. Also check for loose connection and corrosion in the wiring. Put it on a scope to see which cylinder is causing the problem all of the spikes should be even in height. Get someone who has been properly trained on the scope. Hard to find I know. Walt
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Today's Featured Article - Show Coverage: Central Illinois Strawberry Festival - by Cindy Ladage and Janna Seiz. Every year the coming of summer is highlighted by different events for different people. For some, it is heralded with the end of school, tilling the garden, or completion of the planting season. To us, connoisseurs of find food, antique tractors, farm toys, crafts, and downright fun, the annual Strawberry Festival means summer is here. Every year, in Carlinville, Illinois, the Macoupin County Historical Society and the Macoupin Agricultural Antique Association team up to fill th
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