Dennis,
    If you look carfully at the 91 wiring there is a wiring or two
differnet to the ECU.  I did nopt investigate, at the time but I remember
somthing differnet.  COuld be as simple as AC idle ....any Idea?

            Eric                   86-VW4x4
            vw4x4@fyi.net          86-SS Syncro
            Pittsburgh, PA USA     1936-Chrysler
                                   92-Jetta GWC
            www.fyi.net/~vw4x4/vw4x4.htm

On Wed, 22 Jun 2005, Dennis Haynes wrote:

> Although there are a few revisions, all the 86 to 91 ECUs will swap and
> work.
>
> Dennis
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of Roger Van Till
> Sent: Wednesday, June 22, 2005 4:33 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: ECU swappable?
>
> Are 86 and 87 ECU's the same? My 86 is off camping so I cant check the
> numbers.
> TIA
>
>
> Roger Van Till
> '89 Westy "The Moose Lounge"
> '86 GL "Sugaree"
> '81 L "CoJack"
>