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it does not run smoothly and not all plugs fire when supposed to
Addition to above:
No spark or intermittent spark, a problem that was fairly common back when distributors had vacuum advances was that one of the wires going to the pickup coil (pole piece) would break from the back and forth movement of the pickup as the vacuum advance would move it to control the timing, symptoms would be no start or that it would start and when you put a load on the engine and the vacuum dropped the vacuum advance would start to move the pickup coil, the broken wire would open the circuit and the spark would die.To check this problem was fairly simple by removing the cap & rotor and tugging lightly on the wires where they go into the pickup coil/pole piece, if one of the wires was broken you could see it and knew you had to replace the pickup coil which GM called a pole piece (magnetic pickup coil and pole piece are the same thing).
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∙ 12y ago
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