Ever notice a slightly degraded carbon core wire will cause an intermittent or total misfire, worse when raining and wet.
With the higher resistance in the carbon core wire the occurrence of the spark jumping out of the insulation to a valve cover through the side of a wire or right out of the boot to the head before it reaches the plug is greatly increased.
An old solid core wire with nasty insulation cracked to the point that you can sometimes see the exposed wire can continue to deliver the juice to the plug and keep the engine running right.
Comparable to how a garden hose with 10 pin holes does not leak until you put your thumb on the end of it, at which time much like electricity the water will exit the hose wherever the least resistance is found.
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Today's Featured Article - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
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