[6pack] mistery miss

[Colin Thom]

Hi Darrel,

I'm not familiar with your entire thread, but the disconnected vacuum line
would indeed lean your mixture out a bit. I don't know that it would make
only one plug turn white, though. An even brown is a good thing so that
leads me to think you've found the source of your problem...or at least one
of them if the miss is still there. How are the seals on your throttle
shafts? Worn ones can wreak havoc with mixture, carb synchronization and
idle speed.

IMHO, bypassing the entire vacuum system by plugging the line (a piece of
bicycle spoke works well) where it comes off the diaphragm unit on the
distributor doesn't harm the performance of your car and doing so removes
the entire mess from future diagnostic head-scratching. You'll need to
advance the timing to about 10 deg BTDC.

Colin Thom '75

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Sent: Saturday, September 18, 2010 11:00 AM
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Subject: 6pack Digest, Vol 4, Issue 224

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Today's Topics:

   1. Re: [TR] TR6 Mistery Miss (TR250Driver at aol.com)


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Message: 1
Date: Sat, 18 Sep 2010 10:29:04 -0400 (EDT)
From: TR250Driver at aol.com
Subject: Re: [6pack] [TR] TR6 Mistery Miss
To: triumphs at autox.team.net
Cc: 6pack at autox.team.net
Message-ID: <83c1b.3cb6cff7.39c626b0 at aol.com>
Content-Type: text/plain; charset="us-ascii"

Is it possible that a disconnected vacuum retard line @ the dizzy could  
cause the bright white #6 plug.  Noticed that when I pulled the plugs the  
first time.  Not sure if I did it then or it was like that for a  while.
This 
line goes to the rear carb.
 
Tested the intake manifold by spraying starter fluid while the Six was at  
idle.  No detectable increase in idle at all.  Afterwards I pulled #6  and 
it was no longer bright white but brown instead???
 
Darrell


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