If it's just #1 I'd suggest a broken spark plug wire or an issue with the plug
or cap.
Sent from my iPhone
> On Sep 9, 2014, at 2:26 PM, Fred Wescoe <fredwescoe@gmail.com> wrote:
>
> I am stumped.
>
> First the basics. 1963 BJ7. Changed to negative ground 30 years ago.
> Changed to an alternator 30 years ago. Installed Pertronix ignition many
> years ago, red wire to the + post of the coil, the black wire to the - post
> of the coil. The + coil post has the white wire from the battery cutoff
> switch and the switch is on. Plug wires are tight and the coil wire is
> firmly connected to the coil and the cap. Interior of the cap is clean of
> carbon.
>
> Here is the problem: on # 1 plug, sometimes I get spark but most of the
> time I do not. I checked all of the plug wires and the results are the
> same. Some times spark, usually none.
>
> Also, a puzzler, there is a yellow (could be originally white?) wire with a
> black tracer and the wire is just hanging loose below the distributor, the
> coil, the horn and the alternator. There are no missing connections that I
> can see. The loose wire has a black rectangular plastic push on connector
> on it. My 11" x 17" color wiring diagram does not show this wire or any
> other yellow (white?) wire with a black tracer.
>
> Anyone have ideas on the no spark/sometime spark issue? Where does the
> loose yellow/black wire go? What else do I need to check?
>
> Thanks,
>
> Fred
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