Daryl:
On the throttle plate is a spring loaded valve, that is supposed to open
briefly upon deacceleration to lean the fuel mixture and reduce smog. After
years of use the spring gets weak and it doesnt close easily. I usually
either solder the valve closed, or obtain an early solid throttle plate,
and replace it. This should solve the problem that you are having. Also, If
you initial idle speed is set too high, the valve has a hard time comming
closed.
dont set your idle speed over 1000 rpm.
Good luck:
Skip..........At 08:40 PM 7/13/97 +0930, Daryl wrote:
>I have late 77B with the single carb. Air pump, cat converter etc removed
>and ignition advance is 15% at 850rpm. I gave up on the choke and disabled
>it by removing the expanding spring and putting a lock pin in to stop the
>rotation of small lever inside the choke body.
>
>The car runs quite well except that it takes too long to return to idle. I
>presume this is a feature of the antipollution type carby. Any suggestions?
>
>Also I notice that vac advance runs thru a device so that advance only comes
>on when in 4th gear? If I skip this switch and run a hose direct to
>distributor then this seems to make the return to idle even slower eg
>2000rpm for 5-10 seconds before back to 850.
>
>Would appreciate any comments (apart from the obvious - replace with SU's)
>Thanks
>
>
>
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