Some have piped their fuel return to just upstream of the pump and
this has worked for them. I believe there is a thread on thesamba.
Miguel

I have not failed. I've just found 10,000 ways that won't work.
  - Thomas A. Edison

On Sun, Apr 18, 2010 at 11:50 AM, John Meeks <vanagon@gmail.com> wrote:
> My pump started buzzing when I swapped in a new (lightly used) tank. I used
> the pre pump filter to adapt to the smaller tank outlet. Thought the
> pre-filter might be the problem so removed it.  Still buzzy Swapped in a
> couple of spare pumps that were quiet when just pumping gas from/to a gas
> can.  Buzz. I've tried reversing the flow to clear any possible tank
> obstructions. No joy.  At this point it looks like the tank to me.
>
> Any vendors have a tank with the larger (11mm) outlet?
>
> John Meeks
> '91 Multivan
> Northern Michigan
>
> Vanagon Rescue Squad
> www.vanagonauts.com
>
>
>
> On Sun, Apr 18, 2010 at 1:04 PM, neil n <musomuso@gmail.com> wrote:
>
>> On Sun, Apr 18, 2010 at 8:07 AM, miguel pacheco <mundopacheco@gmail.com>
>> wrote:
>> > The last time I had this buzzing on my 88 Westy, I changed my fuel
>> > lines, installed a new fuel filter, and thinking to cure the buzzing,
>> > I also installed  a new fuel pressure regulator and it had no effect.
>> > I still had the buzzing. Installing a new fuel tank cured
>> > it...........so YMMV
>> > Miguel
>> >
>> > I have not failed. I've just found 10,000 ways that won't work.
>> >  - Thomas A. Edison
>> >
>> >
>> >
>>
>>
>> I also swapped out the pressure reg. No difference.
>>
>> Even with new tank etc., still buzzes. More at higher ambient temps.
>>
>> In some cases, I suspect it's the design of the tank though I have no
>> hard proof. My Jetta engine is quieter at idle than air cooled was, so
>> I hear the pump. Tank etc was replaced during engine swap. FP may have
>> been making the noise with the old tank.
>>
>> Neil.
>>
>>
>> --
>> Neil Nicholson '81 VanaJetta 2.0 "Jaco"
>>
>> http://tubaneil.googlepages.com/
>>
>>
>> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
>>
>