Most likely, if your air-cooled vanagaon is like later ones, the ground wire
for the fuel pump goes a few inches to a screw screwed into the frame, and
easy spot to get corroded. 
  Also low voltage to your pump from the relay pops into my mind.
Also tired pump, that can run ok of a good 'hot wire' or other battery, but
not off the signal from the double relay.
 
I found two vanagons in two days recently, with fuel filters full of junk ,
including water, rust, and shiny metal particles.  I replace the fuel filter
on each van, and the fuel pump on one of them.  
   I've been doing it for several decades - emptying fuel filter out
backwards on a clean dish to inspect what's in them.  This is SO USEUFL I
can't say it enough.  I also get the impression that no one ever does it,
but you must if you want any idea about the health of your fuel pump, fuel
tank, the fuel itself.  That one van must have had two full qts. of water in
its gas tank , there was so much water in the fuel filter. 
   Pumps don't go from perfect to dead in one step either, they get weaker
slowly for a long period of time. 
Scott
www.turbovans.com 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Zoltan Kuthy
Sent: Friday, April 04, 2008 11:34 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Air-cooled fuel pump ...

... is not running, but the engine turns over nicely.  Now, if I apply juice
to it, I can start the car.
It does not help to change the double relay.  Air-cooled, manual.
Is it some ground somewhere?
Zoltan
Also, I was trying to get on the Type2 list, but I could not establish
membership.  Any new way?

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8:23 AM