Hi Gary. I've got the same problem with my TR6. I'm guessing that you have
SUs rather than Strombergs, so possibly it's a problem related to constant
depression carbs. I had some luck adjusting the bypass valves so that the
rpms moved more slowly to idle speed. Probably NA for SUs. Some people have
told me that's just the way they are, but I'm not sure that's true.
I was trying to reason out a theory on what might be happening. In overrun,
the carbs are supposed to go over-rich. That's what the bypass valve is
designed to prevent. I wonder if you adjusted them a bit leaner if that
would solve the problem.
Anybody else at least have a theory?
- Hugh Fader
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of Gbouff1@aol.com
> Sent: Tuesday, December 03, 2002 12:38 PM
> To: Triumphs@autox.team.net
> Subject: TR3A, stalling problem, RPM drop
>
>
> Now that winter has set in, I want to trouble shoot a few of
> the minor
> problems that I am experiencing. The rebuilt engine on my
> TR3A runs great,
> plenty of power, good low end grunt and nice pick up. I have
> rebuilt and
> re-bushed the carbs and used a vacuum balancer to synchronize them.
>
> The problem that I am experiencing is that when I quickly
> come off the RPMs,
> my idle drops a couple of hundred RPMs below the normal idle
> RPM. Sometimes
> the engine recovers and comes back up to idle without
> stalling but other
> times it just stalls. The same thing happens when I quickly snap the
> throttle. I've tried 10, 20, and 30 weight oil in the
> dashpots and it
> doesn't seem to make any difference.
>
> Does anyone have any thoughts or suggestions as to what may
> be the problem.
>
> Thanks in advance for any input.
>
> Gary Bouffard
> 59 TR3A TS58399
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