Yes, those are resistance wires, and are there to eliminate static
interference in your car radio (RFI). The problem is that they only are
good for 2 or 3 years, and then have to be replaced. I just finished
replacing mine. About 1000 ohms is correct. I don't have a radio in the
car and really wanted solid copper wires which would have lasted many years
longer, but the dealer said they were no longer available and that they
only cars that use them these days are race cars.
Sumner Weisman
62 TR-3B
Date: Wed, 15 Jul 1998 08:47:59 GMT
From: Egil Kvaleberg <egil@kvaleberg.no>
Subject: Re: Ignition voltage query
On 14 Jul 1998, jaltman@altlaw.com wrote:
> I guess I could be reading the average value of the square wave
> produced by the opening and closing of the points.
Roughly speaking, you are. It is an indication of the dwell angle (aka.
mark-space ratio in other circles) which depends on the point gap. The
reading you get is in the right ballpark, and nothing to worry about.
> The second thing I notice is that the spark plug wires have about 1000
ohms
> resistance. I would have expected 0 ohms.
They have built in RFI suppression, hence the 1k. This is correct, and
the resistance has negligible influence at the high voltage levels we are
talking about here.
> Is this right?
Yes.
Egil
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