Date:         Mon, 22 Jul 2013 07:18:52 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Fuel pump noise?
Comments: To: ROBERTANDERSON294@COMCAST.NET
In-Reply-To:  <1332730117.802449.1374491294879.JavaMail.root@sz0201a.west
              chester.pa.mail.comcast.net>
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At 07:08 AM 7/22/2013, Bob Anderson wrote:
>Hello All,
>  Question regarding my fuel pump. When engine is running, I'm
> getting a continuous noise from the pump, like a noisy dremel.
>When I turn on the key, I hear the normal pump sound, but then once
>I start the engine the noisy dremel sound starts and is continuous.
>Time for a new pump?

It's likely cavitation noise from a constricted inlet.  It begins
after the motor starts because of the extra voltage.  If you have a
square filter before the pump, change it.  If you don't  you can try
to diagnose by drawing fuel from a coffee can (pump uses something
over a liter a minute).  Blowing air or solvent back into the tank
outlet may push some junk off the internal screen and tell you it's
really the tank that's the problem.

I don't think there's a lot you can do about the tank screen beyond
replacing the tank because it's well covered up in the process of
building the tank.

Yours,
David