Re: [DML] Re: Noisy fuel pump (still!) (and again!)

["Walter Coe" <Whalt@xxxx>]

Some of you have brought up some good points. After filling my tank today
at one of the newer Amoco stations in town, I started hearing a screeching
sound that I thought before was my a/c blower. This time it lasted long
enough that I was able to switch of the a/c and still hear it. So it wasn't
the a/c blower. I figure the only things left are the radiator fans and the
fuel pump. I suppose it is the fuel pump, and this one was from PJ Grady
and has only a few thousand miles on it. I'm going to check my fuel
pressures and check the flow through the return line. I didn't think to try
that before.

For David T,
> 1) You are in a hot climate

Yes, very.

> 2) there is a problem with the pressure regulator set too high causing
> the fuel to heat up as it circulates in the system.

I'll check that. Good idea.

> 3) when the tank is low the fuel will get hotter as there is less fuel
> to dissipate the heat into.

Yes, but it can still get noisy at 1/2 a tank.

> 4) air leak in the pick-up hose.

Not likely because I still have symptoms while the whole hose is submerged
in fuel.

For Eric P.,
Remember that both the supply & return coolant lines pass under the fuel
tank. In fact, the tank has indentations on either side for the coolant
pipes to fit. This is probably one of the more significant sources of heat
in the fuel. I'm thinking about replacing the sections of aluminum pipe
here with long pieces of silicone radiator hose just for general principles.
I don't like my fuel being 118F even if it doesn't make my pump noisy. Even
if I do have a restriction causing heat build-up, changing the aluminum to
silicone is probably a good idea anyway.

For John H,
Except for the recent screeching sounds, this pump is as noisy as the one
that came with the car. So I suspect that the problem isn't the pump and
more than likely just hot fuel for whatever reason. You live in a hotter
climate than I do, so have you noticed noisy pumps with hot fuel?

Walt Tampa, FL