Alistair, it can be water in the fuel contamination.  One way to see is to
pull the hose from the gas tank to the fuel pump and let it drain into a
clear mason jar.  You don't have to drain much in there, just the first
mason jar full, then hook the line back up to the pump to stop it from
draining and take a look at the fuel.  The water will settle to the bottom
of the tank and it should be the first bit that comes out when you drain
the tank.  If you let the mason jar sit for a short time you will see it
separate out.  You may also see rust particles coming out as well.  If
everything is clear and water/rust free then you know this isn't the
problem.  If you see rust, you should consider a new fuel tank and new
seals and lines for it.

One source of water getting into the tank that most people ignore or don't
think about is in the front wheel wells on the 2wd Vanagons.  They plastic
expansion tanks live there and on top of them there is a plastic valve with
a big rubber seal around it.  Over time the seal can go bad and then dirt
and road debris will get in there and allow water to get past the seal.
 Now every time you drive through a water puddle you are getting some water
in your gas, or if you are driving all day in the rain, it is getting in
there.  Be sure to check or change these seals if you haven't before.  I
went through this with my Dad's 89 Wolfsburg.  His gas tank was also shot
by rust by the time we figured out what was happening, but since we
repaired all of these things (new tank, new seals and hoses) he hasn't been
having the stalling out problem.

Hope this helps,
Ken Wilford
John 3:16
www.vanagain.com

On Mon, Jul 15, 2013 at 9:02 PM, Alistair Bell <albell@shaw.ca> wrote:

> I will. But the timing and the cure of the problem makes me think bad gas.
>
> One would think that if it was a wiring issue it would occur more
> frequently, and in winter too. Winter here means rain, lots of rain. Temp 2
> sensor in a bit of an exposed to road splash area.
>
> But I will check the connection and wires.
>
> thanks
>
> alistair
>
>
> On 2013-07-15, at 5:49 PM, Dennis Haynes wrote:
>
> > Check the wiring/connections to the temp 2 sensor next.
> >
> > Dennis,
> > From my phone.
>

--
Thanks,
Ken Wilford
John 3:16
www.vanagain.com