At 06:41 PM 6/26/2009, neil N wrote:
>I have no idea what pump sounds like when engine up to speed, but it
>seems this update may help.

I imagine it's the same -- the pump (at a given voltage) shoves the
same volume of fuel through the system whether or not the engine is
using some of it, because in all cases most of it flows through the
pressure regulator back to the tank.

If anything, flow would be reduced when the engine is working, since
MAP would rise causing a corresponding rise in regulated fuel pressure.

  --
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'89 Po' White Star "Scamp"