I'd just use the pump and filter in situ to run off a can of gas.
like take the fuel tank out of the picture, and see it it's still noisy that
way.
If it gets quiet...then you consider restricted pick-up in the main tank.
if it's still noisy ...then you consider the pump itself.,
and you need to know the filter is decent of course.

sometimes the pump won't suck fuel out of a gas can until the feed hose has
fuel in it, rather than just air.
if you need to ...
put the gas can inside the van, and start a siphon to the fuel pump.
expect the gas can to empty pretty quickly as all fuel return will still be
going back to the main tank.

another trick is to blow back up in to the tank some ..
( remove gas cap first  so it doesn't pressurize )
like with compressed air ...
see if that clears up the pick up in the fuel tank. Don't overdo it on air
pressure though.

if you have a small filter before the pump ...
those are getting harder to find, and clog up easily sometimes.
the bigger metal can filter downstream of the pump is the better deal, and
easy to retrofit.

Scott
www.turbovans.com
----- Original Message -----
From: "B Feddish" <bfeddish@NETREACH.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, April 07, 2010 2:09 PM
Subject: Re: Fuel pump buzzing

> Both the pump and filter are about 2 to 3 years old.
>
>
>
> Bryan
>
>
>
> From: John Meeks [mailto:vanagon@gmail.com]
> Sent: Wednesday, April 07, 2010 5:00 PM
> To: B Feddish
> Cc: vanagon@gerry.vanagon.com
> Subject: Re: Fuel pump buzzing
>
>
>
> Mine started buzzing when I installed a new tank with the small outlet.
> Yours could be some junk blocking the line. Reverse the pump wires and run
> a
> couple of times.
>
>
>
> How old is your fuel filter (s) ?
>
>
> John Meeks
> '91 Multivan
> Northern Michigan
> Vanagon Rescue <http://www.vanagonauts.com/Vanagon-Rescue-Squad74.htm>
> Squad
>
>
>
>
>
> On Wed, Apr 7, 2010 at 4:49 PM, B Feddish <bfeddish@netreach.net> wrote:
>
> My fuel pump is buzzing. Is it time for a replacement?
>
>
>
> Thanks,
>
> Bryan