[TR] erratic carburator idle

DAVID MASSEY dave1massey at cs.com
Fri May 18 12:49:22 MDT 2018

It might be your over-run valves on the side of the carb are not working right.  the 40-year old diaphragms are probably more like ceramic.  Try making block-off gaskets and remove them from the equation.



Dave Massey



-----Original Message-----
From: Rochlin Robert <rrochlin at comcast.net>
To: Triumphs (triumphs at autox.team.net) <triumphs at autox.team.net>
Sent: Fri, May 18, 2018 1:09 pm
Subject: [TR] erratic carburator idle

	I’ve been working through, what I think is, a carburetor problem. My 72’ TR6 has a rebuilt engine with a Goodparts mild cam and compression of about 9:1. Then I start from cold the engine runs really well, but after it is throughly warmed up it gets finicky.  When I idle for a long period of time the idle will gradually decay.  Also if I stop, the engine will start right up, but idle at a very low RPM.  This poor idle improves as the engine is rum for a while. On one hand is sounds like vapor lock or at least heat effecting the carburetors, but the weather here is not hot yet and the engine seems to exhibit this behavior when the ambient temperature is in the 60’s F.   My knee jerk reaction is that I should add a carburetor heat shield, but before I did that I wanted two ask if anyone else has had this difficulty or may suggest something I’m missing.    Thanks in advance.	Bob** triumphs at autox.team.net **Donate: http://www.team.net/donate.htmlArchive: http://www.team.net/archiveForums: http://www.team.net/forumsUnsubscribe/Manage: http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com
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