For me this was a bad O2 sensor.  Quick check is to just unplug it
(the single wire, not the double wire (thats the heater)).

Gregor

On Mon, Jul 6, 2009 at 4:27 AM, Joel Cort<joel_cort@yahoo.com> wrote:
> Hey gang,
>
> I'm trying to help out a buddy with a 86 2.1Ltr. Westy.
>
> The van idles great hot or cold and starts right up.
>
> While driving along all the sudden it will hicup and miss loosing all RPM under load. And pick right back up.
> When slowing down to take a turn and picking up speed it will buck and miss with some backfiring.
>
> I have checked the wiring and it all looks good. I have also checked and replaced the easy things like:
> New TempII sender and
> I swapped a good AFN (out of my van) AFM
> A good Idle Stabiliser relay
>
> but the symptons are still there.
>
> Any hints where and how to track this gremlin down?  I will swap the brain next and the O2 is new.
>
> Thanks,
>  Joel Cort
> Rochester NY.
>
> 89 Syncro Westy (CinnabarVan)
> 87 Syncro Transporter (Stella)
> 73 Westy Campmobile (agent orange)
>
>
> Founding Member of the Empire VW Camping Club
> &
> Westies at Watkins - www.westies-at-watkins.org
>
>
>
>