Re: [AMC-List] coils

["Jim Blair" <carnuck@xxxxxxxxxxx>]

A: It's easy enough to check the voltage at the coil, but here's another 
scenario for you: Did you do anything with the points and condenser? When I 
switched the coil in my '73 J4000, it ran like a rocket for about 2 weeks 
then ran like crap again. I replaced the points and condenser, and it's been 
fine ever since (as fine as any motor can be with a weak brake booster and 
carb that clogs up when I shake up the crud in the bottom cruising my 
cabin's 4 mile long bumpy gravel "driveway")


From: Don Johnson <donjohnson@xxxxxxxxxxxx>
Subject: [AMC-List] coils
To: amc-list@xxxxxxxxxxxx
Message-ID: <005b01c6d509$27ada070$6400a8c0@DONS>
Content-Type: text/plain; charset=iso-8859-1

Well I thought I had my problem fixed with my Javelin cutting
out. I  had
>been having trouble with it cutting out in just about any
situation, high
>speed, low speed, warm, cold, it didn't seem to  matter. It
would cut out
>I would pop it into neutral and it would  fire right up again.
I have
>electronic points, but it has done it  with both the stock and
electronic,
>I have replaced the voltage  regulator, the distributor, cap
and rotor,
>coil wire,  I have checked  for shorts in the wires under the
hood but not
>under the dash. I put  a coil from Napa in and the guy said
that coil
>needs an external  balast. I have not seen and external balast
on my car
>but in the  service manual I have it says there is a balast
wire that
>should not  be cut. When I put the Napa coil in it ran great
for about 2
>weeks,  today it started acting worse then it did before.  Can
anyone help
>me  out with this thing? It is a '70 Javelin with a '73 360 in
it. Thanks
>Keith
>
>
>Any thing you could do to help would be appreciated, thanks
Keith


Keith,
Coils with ballasts on a 12 volt system are usually meant to run
on 6-8 volts continually.
When you start the car, you get a full 12 volts supplied to a
6-8 volt coil and you get a hot spark.
When the key moves away from the crank position, the 12 volts go
to the ballast and the correct voltage is
supplied for normal running.
I'm guessing that you have operated your coil continuously for 2
weeks on 12 volts and it is burning up.
Check the coil, if its bad, go back and make sure the ballast
wiring is correct.
Don

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