Posted by John T on September 13, 2013 at 07:51:51 from (216.249.76.176):
In Reply to: spark arcing to block posted by D Mann on September 13, 2013 at 06:31:05:
Id thoroughlly clean and dry the plug porcelain (inspect for cracks or carbon traces) and if she still arcs could be the wire end boots etc. If the plug were bad or an open circuit the voltage rises higher and current can arc no tellin where lookin for a path to frame ground. When people drastically increase a plugs gap HV arcing can be more of a problem requiring quality wires and distributor caps. If theres an open circuit with no current path voltage can rise so high even good wires can have a problem.
You might take a look at the cap and rotor tip and internal pick up towers etc and timing (rotor tip is at a pickups when points just break open) for conditions that are greatly increasing voltage ??
If a plug wire has a break (not carbon core suppressor wires are they) voltages can rise also.
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