Thanks. Then it's logical that sound is of less intensity in the morning
when
there is no fuel presure and it has to be generated.


"Sean Dinh" <seannydinh@znet.com> wrote in message
news:3F22B4F4.7DA99CFF@znet.com...
> The pump pressurize the fuel system. The pressure regulator has to open
> to let the fuel to flow, to reduce the pressure. That's where the sound
> come from.
>
> Mickey wrote:
>
> > What is making the noise when you turn the key until the
> > picture on the dashboard (of fuel pump) goes off?
> >
> > I'm sure it is not the fuel pump making the noise because
> > fuel pump is located underneath the rear seats, and the
> > noise is comming somewhere around fuel pressure regulator
> > valve.
> >
> > Is that regulator making the noise?
>