Check out the aux air regulator.  When the engine is cold you should be able
to blow through it into the air distribution box.  After the engine heats up
it should close and you shouldn't be able to blow through it.  Yours may be
stuck open.

Check out your cylinder head temperature sensor (next to/on cylinder #3).
With the engine cold it should read around 2500 ohms with respect to ground.
After the engine heats up it should approach zero ohms.  Yours may have
failed open (infinite resistance) which would work for a cold engine, but
not for a warmed up engine.

The only other thing I can think of is the EGR system (if ya still got it).

Check out the library at www.type2.com for an excellent aircooled fuel
injection troubleshooter.

Good luck!

Christopher Darilek

----- Original Message -----
From: "Keith Olsen" <VintagePkr@aol.com>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, August 08, 2000 11:52 AM
Subject: 2.0L runs fine cold (5min.)then stalls

> Hi,
> can anyone point me in a direction for the aid of my air-cooled 2.0?  it
> starts fine when cold but after idling or driving for 5 or so minutes, it
> stalls out.  after it cools for a few mins. it will start (sputteringly)
back
> up again.  but for a shorter span of time.  trying to restart it right
away
> is futile.  The only thing that will keep it going is if you keep the revs
> over about 3k and then it will stay running but you can hear it
> intermittantly missing but i cant tell if it is a fuel miss or an ignition
> miss.  Any ideas would be greatly appreciated.
> keith
>