You did set the fast-idle speed at the correct choking point, but what was
the normal idle like before you did that? I would expect full choke to
cause very poor running as it would be running far too rich. Unless you
either push the choke in half-way (for example, you learn by experience) as
soon as the engine fires it will be so rich that simply pushing the choke in
after that will cause the engine to die unless you open the throttle a
little as well until the excess fuel has burnt off. 'Unscrewing' the fast
idle screws will reduce the fast idle speed.
PaulH.
----- Original Message -----
From: Phillips, Frank <fwp@ufl.edu>
To: <mgs@autox.team.net>
Sent: Sunday, November 05, 2000 3:59 AM
Subject: SU Fast idle and choke problem
> List,
>
> I'm still working on setting the choke. I followed the manual and set the
> fast idle screws to provide 1000 RPM with the choke pulled to the point
the
> jet were about to move down, this was done with the engine at normal
running
> temp and the air flow was balanced. This morning I went to garage and
> started the car and it was unable to hold an idle at full choke. The car
ran
> very rough and was at about 1200 RPM cold. Tonight I unscrewed the fast
idle
> screws and started the car, much better idle cold now at a higher RPM. I
> balanced the air flow to provide an even idle and left it till morning.
What
> did I do wrong setting the fast idle? Did I set it with the choke at the
> right point? Thanks for the help.
>
> Frank Phillips
> 1968 MGB
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