Skip:
Thanks for the clarification. I knew someone would be able
to clarify my experimenting with this little bugger!
Scott Suhring
Elizabethtown, PA
'70 TR6
> Scott, Tim,
> I've done the adjustment on mine following the outline in the Bentley
> manual and it responded well. Turning the screw clockwise reduces the
> spring pressure and at some point allows the diaphragm to "float"
> resulting in a sudden increase in idle. To adjust do the following.
> 1. Disconnect vacuum retard line and plug the line. This should bring
> engine idle rpm up to about 1300 rpm.
> 2. Turn the adjusting screw clockwise until the engine speed increases
> abruptly to approx 2000-2500 rpm (indicating the valve is floating).
> 3. Turn screw counterclockwise just far enough to bring rpm back to
> 1300. Using the throttle, suddenly increase engine speed and let it
> return to normal. Engine speed should drop back to 1300. If it doesn't
> the valve is still floating and should be adjusted counterclockwise a
> half turn at a time until you can rev the engine and have it return to
> normal (1300). When you find the point at which this happens back the
> screw out counterclockwise one half turn more to properly seat the
> valve.
> 4. reconnect vacuum advance.
>
> All this comes from the Bentley manual p. 224.
> It probably would be a good idea to back the adjusting screw all the way
> out as you begin to ensure that you don't start out with the valve
> already "floating".
> Hope this helps.
> Skip Osmundsen
> '76 TR6
> '60 TR3A
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