Re: IML: arc-ing coil - rough running 440

["Frederick Joslin" <fljoslin@xxxxxxxx>]

There are some tests that you can do on a coil for resistance across the different windings.

I do not know what the specs are, but you should be able to do this with the coil in the car. 

 

Also, the coil should be getting about 6 volts (or at least much less that full voltage ) with the key in the ignition position.

This would be worth testing.

 

Good luck.

----- Original Message -----
From: "Kenyon Wills"
To: IML
Subject: IML: arc-ing coil - rough running 440
Date: Thu, 1 Mar 2007 13:08:59 -0800 (PST)


Car ran fine and has what I thought to be a newer
coil.

Picked the car up from the tire place and it's engine
is missing significantly, and the battery was dead at
pickup time. Newer battery, so that's not a suspected
part of the dead charge problem.

With engine off, but key to "run" position, the coil
is making a snapping, buzzing sound internally.

Closer inspection shows that coil is discharging volts
and zaps of electricity, especially if you touch it(!)

Going gack in with a screwdriver instead of a finger
shows arcs like crazy with the engine still.

Wires to coil are clean and not appear to be touching
ground far as I can tell.

Coil and plug wire set are new.




Bad coil?

Bad ignition module or magnet on the distributor?

Engine is rebuilt and everything is pretty fresh
besides the electronic ignition module - stock unit on
the '72.

Coils are supposed to be pretty durable. Could be
this one's a goner, but before I take it out, any
other ideas?

-Kenyon



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