Don't want to steal your thread but I'm dealing with the identical
problem.  Started a month or so ago (fuel pump buzzing) so I put in a
front, pre-fuel-pump filter.  That solved the problem for a while.
Yesterday, I took a 100 mile journey.  By the time I was three blocks from
my destination, the fuel pump was buzzing loudly (and could have been for a
while since I was listening to music the last half of the trip).  At that
point, the van started losing power intermittently and I hobbled the last
three blocks.

Today, I bought another fuel filter and got ready to install it.  Let the
hose from the tank drain into a bucket for a few seconds -- piddly stream.
Since, I'm sure this is caused by rust in the tank, I took a good breath of
air and blew backwards on the hose into the fuel tank.  Sure enough, I felt
pressure and then a light pop and I was blowing air easily.  Let the hose
drain back into the bucket and got a good strong stream.  Attached the
filter  and fuel pump is happy.  But how long it will be happy is another
question.  I'll find out tomorrow when I do the return 100 miles home!

Rick

On Fri, Feb 12, 2016 at 1:44 PM, Tyler Hardison <tyler@seraph-net.net>
wrote:

> Aside from the normal startup sound, every once in awhile I hear a noise
> that sounds like cavitation noises? Like what I'd expect if there is air
> being introduced.. But I'm not smelling fuel, and there does not seem to be
> any visible fuel leaks.
>
> Almost sounds like a broken piezo buzzer?
>
> First question is, how long has it got..
>
> Second question is, my van never had a "front" fuel filter.. (Not since
> I've owned it).. Maybe I should get one?
>
> --t
>