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[T3] Chokes and Starting (was Woops)


Also, unless the throttle is engaged,
the choke tends to stay at the high idle
position. Driving away allows the choke
coil to position the choke in the proper
position. Leaving it at idle without the
gas pedal being pushed keeps it at idle
too long.

It's supposed to kick itself down to
lower and lower idle with time, but
the pressure of the throttle springs
often overpower the choke element,
and keep it at the high idle position.

BTW, for those unfamiliar with the time
factor. The choke coil heats up and
rotates the butterfly valve from the
closed (start) position to the fully
open position (run) based solely on
the time the ignition key has been
in the RUN position. No fancy feedback
mechanism, just a heated coil.

This can be a problem when the car won't
start, the ignition key has been engaged
a lot, the choke coil is hot and the
choke is fully open, all of which make
starting even harder. At this point you
are back to the ol' pump-gas-to-enrich-
the-mixture start routine, which requires
a deft touch, unless experienced. You have
to wait until the choke coil has fully
cooled off to do any choke adjustments.

Jeff '67 Sqbk

-----Original Message-----
In Sue's defence, VW say you should drive the car off right away.  It's more
important with carbs as the auto-chokes come off with time rather than engine
temp, so if you leave it idling, the chokes are fully off and the mixture is too
lean and the idle too slow for the still cold engine.

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