[TR] spark jump

[Randall]

> Of course it could be defective wires that aren't conduction 
> to the plugs properly, too.

Or a bad connection between the wires and plugs.  

One of our club members had the type of wires with resistors inside the plug
boots, and the inside of the boot was falling apart.  The excess voltage (he
also had a Lucas Sports coil) started jumping through the rotor to the
distributor shaft, and ruined the rotor in just a few hundred miles.

Easy check for this problem is to measure the resistance of the wire, end to
end, while tugging gently on the wire.  The exact value is not so important
(anything between 0 and 20K ohms is probably OK), but they should all be
roughly the same.  If one or two wires are several times the resistance of
the others, they are probably bad.  Modern "carbon core" wires seem
especially prone to failure this way.

Randall