That hose is the fuel pressure regulator.  It is small like 3mm ID.but any
skinny vacuum line will work from the flaps.

Most likely is that you are using more gas then you need
to...........pressure is increased at the injectors, and the electrical
pulse that opens and closes the injectors remains the same.......thus more
fuel in same amount of time.  My  theory anyway...........

Adam P
81  Westy "The Brick "
70 Single Cab "Whitey"
74 Beetle "Ol Yeller"
73 Transporter (STILL at paint shop)
1988 Vanagon Wolfsburg
1976 Transporter (New CA bus)
1974 412 "Goldmember"
Used Vanagon Parts for sale (mostly aircooled)
----- Original Message -----
From: "Tonya Pope" <Tonya@HOLOREALITY.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, May 12, 2003 11:37 AM
Subject: vacuum hose

> Hi all,
>
> I need to find out the size (if there is such a thing) of the vacuum
> hose on my 87 that connects (get ready for technical jargon) -- the
> cylinder thingie at the top/middle of the engine - just to the right of
> the distributor cap - to something underneath it.  The cylinder
> thingie has three big tube like things also sticking into it.  The
> vacuum hose connects to a nipple on the end.
>
> Also - what changes in engine performance would happen if this
> hose were worn, cracked, or just plain not attached any more?  It
> was off when I opened the engine compartment this morning, not
> sure how long it's been that way.  The end that connects to the
> cylinder thingie is cracked so probably isn't forming a good seal.
>
> Thanks all!
> Tonya
> 87 Vanagon GL Wolfs
>