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Re: [T3] carb problem


Hi Andy,
The carb produces a mist of fuel vapour, liquid fuel and air; it isn't all
vapourised there.  A leaking butterfly shaft will usually drip for a
while after shutting off, but in use there's a vacuum drawing air in so it
isn't usually problematic when driving.  The idle passage feeds in below
the butterfly and doesn't deliver fuel until the butterfly closes and there
is a vacuum below it.

Replacing the bushes is the only way to sort it, but they are in a separate
piece if you want to swap that from a carb with a problem elsewhere. Take
care of the gaskets; they are a bit fiddly to recreate!  I would be
surprised if you couldn't find another carb (same side of course) at
Malvern (3/4 July).

The original carbs are 32PDSIT-2/3; 2  for left and 3 for right.  They
aren't easily interchangeable with 32/34s from a Type 4 without doing
things to the air-cleaner to㨍robably linkages too.  There is usually
a guy at the shows who rebuilds carbs quite reasonably.

On fixed jet carbs, rich running is usually caused by a dirty air-filter,
needle valve leaking, choke(s) not opening fully once warm, dirty (air)
passages in the carb, broken tip(s) to volume control screw(s), or
misadjusted idle mixture.   Ignition problems, wrong plugs etc. may also
give the appearance of rich running - sooty plugs etc.

Dave.
UK VW Type 3&4 Club
http://www.hallvw.clara.net/
----- Original Message -----
From: Andy Thomas <andy@type-one.demon.co.uk>
To: <type3@vwtype3.org>
Sent: 16 June 1999 22:08
Subject: [T3] carb problem


> help!
>         my daily runner '73 fasty has been running very rich since I
> bought it a couple of months ago.


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