[TR] idle and running troubles

[Ben Zwissler]

Gary,

Not sure that the piston failing to travel all the up would cause idle problems.  The pistons are usually sitting at the bottom of their travel during idling.  Assuming the float and jets are set about right, I'd check for an air leak that's letting air in without going through the carbs.  I had a similar problem and it was the PCV system letting too much air in.  Could also be an intake leak or any gasket/seal that has manifold vacuum applied.

Ben.....


Ben Zwissler
bjzwissler at gmail.com
Columbus, IN
1966 Triumph TR4A
1973 MG Midget
1980 Triumph TR8
2007 Mazda RX8
2002 Yamaha FZ1
2003 Honda ST1300


Date: Sat, 6 Jun 2009 11:43:36 -0700 (PDT)
From: Gary Nafziger
Subject: [TR] idle and running troubles
To:triumphs at autox.team.net
Message-ID:<401607.20585.qm at web59415.mail.ac4.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

Just a note here for some possible ideas.  I'm having trouble getting my tr-6
to run right since overhaul.  At present won't idle and seems to run well
without miss at high rpm's.  I finally took it to local mechanic familiar with
old cars's and zenith carbs.  fuel pump is putting out around 2 lbs. valves
set ok............no vacum leaks.  However one piston on carbs doesn't raise
as high as other.........(engine off).  any quick and dirty ideas?

gary n.