It connects to your charcoal cannister valve thingy behind the right
side of firewall.

On 11/10/08, Bill Collins <wb6otg@intrex.net> wrote:
> On my '87, the short hose between the idle stabilizer valve and the air
> chamber below it has a molded fitting that looks like a hard plastic vacuum
> line should connect to it.  I don't see this in the Bently.
>
> Should this hook up to something, or did someone replace the hose with the
> wrong one?
>
> (Yes, it's really a vacuum connection. Plugging it makes the engine idle
> MUCH better.)
>
> This could explain why someone set the idle mixture to full rich.
>
> Ah, the joys of working on a vanagon that has been butchered by someone who
> had no idea what they were doing. (Repair shop name available by request)
>
> Bill
>

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Chris S.
Disclaimer: "Death and serious injury may occur"