Temp II sensor or wiring to temp II has gone bad.  Check ground connection
and wiring with an ohm meter and Temp II against the chart in the Bentley.
Or just bypass the Temp II plug with a paperclip and see if that fixes it.
Temp II is the blue sensor on the thermostat housing.

Ken

On Wed, Aug 5, 2015, 9:34 PM john <john@jhl.mgacoxmail.com> wrote:

> A gremlin from the past seems to have reappeared on my '84
> Vanagon (1.9L) engine.  It started the other day after I
> went to move my van after bringing my Son home from high
> school (10-mile round trip plus plenty of waiting time in
> traffic at high school).
>
> Engine turns over fine, but does not fire.  Possible smell
> on unburnt fuel.  The tach need flutters a bit while starter
> is engaged.  After leaving van to cool down for a few
> minutes or longer, it starts and runs fine.
>
> My first suspicion is that there is dirt on the contacts in
> the big connector between the fuel injector cable and the
> fuel electronic control unit, and that I should clean the
> contacts on both sides of the connector with CRC-626.  This
> was a problem many years ago, but only showed up in cool
> damp weather.
>
>
> My second suspicion is that their is a problem with the
> ignition control unit.  I replaced that unit in 2003 when I
> put in a Boston Bob long block.  The fuel injection cable
> and the fuel ECU are the same ones that were on the van when
> I bought it in 1997.
>
> I would appreciate the wisdom of the list in solving this
> problem.
>
> John
>