There's a pigtail to fix "Vanagon Syndrome" being auctioned on eBay at the
moment:

http://cgi.ebay.com/ebaymotors/aw-cgi/eBayISAPI.dll?ViewItem&item=600329210

If you want to try it yourself, here's a post I saved from December '01:
----------
Piece O'Cake, just add the little capacitor between terminals 2 and 4
on the AFM and it will solve your bucking.  This is what the VW
pigtail does for $125, the cap. is only about $1.50 from any electronic
shop.

There is a great site on the WetWesties web page that details the
instructions on how to repair this yourself.

Go to: http://www.geocities.com/harald_nancy/
Select the link for: Vanagon Intermittent Syndrome

Joel
89 Syncro Westy
Rochester NY.
-------------

David Jaffe
1986 Syncro West'faux'lia
1982 Diesel -> I4 Westy
Portland, Oregon

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of Laurence Smith
Sent: Monday, January 14, 2002 10:13 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: loss of power at highway speeds...

Magic harness is VW part number 025 906 302A
I think this would help with your problem. It was developed just for
this symptom.
It is pricey at VW dealers (no kidding).  BusDepot has them at lower
prices.

Laurence Smith

> -----Original Message-----
> From: Vanagon Mailing List
> [mailto:vanagon@gerry.vanagon.com]On Behalf
> Of Jamie Ayotte
> Sent: Monday, January 14, 2002 11:50 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: loss of power at highway speeds...
>
>
> hey hey,
>
>  i have searched the archives and have done alot to figure
> out the problem.
> the problem:  my 87 westy drives GREAT aound town and
> anywhere as long as
> i'm not at 65-70 for any extended period of time (20-30
> mins.)  as soon as i
> reach that point, it starts to lose power and sort of buck
> and skip. not to
> mention, very poor gas mileage.  i shut it off, start it
> back up and it's
> okay, for about 20 mins or so.   i have: changed the o2
> sensor, the temp
> sensor (the one below the thermostat) the fuel pressure
> regulator, the
> ignition coil, the fuel pump & filter, added a fuel filter
> in front of the
> pump... all based on recommendations in the archives.  does
> anyone think
> that it is the"magic" harness that will solve this? and if
> so, what is that
> part called?  and where would i get one?
>
>
> Thanks again!
>
> Jamie
> 87 westy
> 78 vespa
> 98 golden retriever
>