I will second Paul's suggestion that something is sticking, then releasing.
See that the throttle cable moves smoothly. One broken strand can sometimes
catch in the sheath. Disconnect the return springs and see that they have
some stretch & recovery ability. While they are off, move the shafts and see
that they turn smoothly, from wide open and to closed. Also jiggle the shafts,
to check for wear. If you can, try to get a drop of oil onto the shafts where
they enter the SU body. Before the springs are reconnected, double-check the
attachment points; one often sees springs connected to wrong place. Can you
observe this event at home, watching the linkages immediately after
stopping?Bob
---------- Original Message ----------
From: <1971mgb@cox.net>
To: MG List <mgs@autox.team.net>
Subject: [Mgs] RPM's on my B
Date: Sun, 13 Mar 2011 22:54:48 -0400
I've had a problem on my 71 "B" for years now, that is to say my RPM drop
drastically while idling at a stop light or the car is just sitting and
idling, normally it starts out about 1100 then a few seconds later my RPM's
drop to around 500 or lower, then I have to pull the choke just to keep the
car running
I've rebuild the carb's (HS4) I put in a few different distributors, set the
valves, no known vacume leaks,nothing seems to cure this issue, any comments
or suggestions would;lde be more than welcomed.
71 B
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