Might be dirt in the fuel tank clogging the pickup tube screen.  Has the
tank ever been changed?

On Tue, Jun 21, 2016 at 9:30 PM, Doug Toomey <drt@uoregon.edu> wrote:

> Hi all,
>
> 87 Westy, on a trip. Fuel pump is buzzing. Replaced original Bosch that
> was also buzzing loudly 5 months ago. New one is Bosch too. No problems on
> the new one until today. Any ideas? Thanks!