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
>