If you have Stromberg carbs, the symptoms described can be caused by a
stuck/dirty temperature compensator on either carb. These can be cleaned and
re-set, and there is techincal information available on how to do it. Not
sure where I picked it up though, either Moss Motors or the Triumph Registry
website (VTR?) some time ago.
Cris Hemingway
> From: vance.navarrette@intel.com
> To: mhooper@digiscreen.ca; sumton@sbcglobal.net; 6pack@autox.team.net
> Date: Fri, 7 May 2010 13:47:47 -0700
> Subject: Re: [6pack] vacuum leaks
>
> Mark:
>
> Oooo, very astute. Wish I thought of that one. Yes, the vacuum retard might
> be on its way out, and could indeed cause an unsteady idle. To test this
idea
> disconnect the vacuum line to the dizzy and cap it. The idle should be
steady
> and fast with the vacuum line plugged. The retard drops the idle by about
400
> RPM when functioning, if I remember correctly.
> BTW, the later vacuum retard is NLA from the big three, last time I
checked.
> However the earlier vacuum retard was still available. If you do need a
later
> vacuum retard capsule, you can order the earlier one, and hacksaw the
threaded
> rod off of the unit. Other than the presence of the threaded rod, the old
and
> new retard capsules are identical, so cutting the rod off the earlier one
> gives you a drop in replacement for the later style. Ask me how I know.
>
>
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