Possibly a bad O2 sensor? An easy test would be to disconnect it and
drive around. Disconnect the single wire which has a blade type
connection. If that solves the problem it won't hurt to drive it
disconnected until the sensor is replaced. It will just run richer.

Could this also be the a bad Temp II sensor? Or maybe poor grounds?

Mark K
1986 GL/2WD/4SPD

On Aug 3, 2009, at 7:44 PM, Bart Prinsen wrote:

> I am wondering if anyone can offer some help on this issue my
> vanagon has:
>
> When I start it up and have it running for about 4 or 5 minutes, my
> van
> stalls. It seems as if it is not getting fuel to the engine.
>
> when that happens I turn the engine off briefly, and restart it and it
> starts and runs fine after that. If I am driving, when I notice it
> start to
> studder I can just put it in neutral, turn the ignition off and
> restart it
> while still driving. It then will run fine until I stop and let it
> cool
> down, and then the same thing will happen.
>
> It does this consistently. It never becomes a bigger problem than
> that. It
> will always restart right away, and runs ok after that.
>
> Somone I spoke with thought it might be a vacuum hose. Does this sound
> logical? Is there anything else that this sounds like it could be?
>
> Any help would be appreciated.
>
> Bart.
>
> Vancouver, BC, Canada.   1988 Vanagon.