Date: Wed, 12 Nov 2003 14:07:46 -0500
Reply-To: vw4x4@FYI.NET
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Eric Zeno <vw4x4@FYI.NET>
Subject: Re: Cold Starting
In-Reply-To: <3FB20D9E.23234.3AE088@localhost>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'll be glad to, but I'll tell you that most of your
eyes will be glazing over soon.
Put a DC current thru any coil, and you get a magnetic
field. Remove the power the field collapses, causing
a reverse voltage into the source. If this source was
removed by a switch the voltage will jump the gap
at the switch and crate an arc. This is a basics of the
ignition system. The VW coil is set for a given gap,
and several other standard things like wire resistance,
etc. If for any reason this should change (with Bosch Platinum
plugs) you run the risk of damaging the coil by over heating.
This is exactly what I have found, as the coils still work,
but several internal shorts would not let them charge
enough to jump the plug gap any more.
Got it. WE will have a test on this tomorrow...
LOL Eric
Jack wrote:
>I was hoping Eric would provide a bit more information about HOW the spark
>plugs could be responsible for the coil's demise. Has anyone else observed
>this phenomena?
>
>//Jack
>
>
>On 12 Nov 2003, at 12:50, Mike Collum wrote:
>
>
>
>>I may as well put in my 2¢ worth, too.
>>
>>Both my '84 and '85 are running with Bosch Platinum Plus 4 plugs (2
>>years worth) and the only things I've noticed are easier starts,
>>smoother running, and a little better gas mileage.
>>
>>Mike
>>Houlton, Maine
>>
>>
>>
>>> Interesting information. I have been running Bosch Platinum
>>>tipped plugs for many years in my stock '85 vanagon L, with good
>>>results. Maybe my coil is unusual? They seemed to work ok in
>>>my old Horizon, now sold, and in the daily driver Neon also.....
>>>
>>>
>>>
>>>>Dave,
>>>> Bad new. Your coil is about to die. This is because of the
>>>>plugs you put in. I've seen this a dozen times. Those plugs
>>>>have killed more coils than I've ever seen any time in my life.
>>>>Replace the plugs with stock, and replace the coil.
>>>> Now, you don't beleive me, right? When its dead and you have
>>>>tryed a dozen other things like so many other pros, that I had
>>>>to strighten out, don't say I didn't tell you so....
>>>>
>>>> Eric 86-VW4x4
>>>> vw4x4@fyi.net 86-SS Syncro
>>>> Pittsburgh, PA USA 1936-Chrysler
>>>> 92-Jetta GWC
>>>> www.fyi.net/~vw4x4/vw4x4.htm
>>>>
>>>>
>
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