Date:         Wed, 21 Apr 2010 14:04:05 -0700
Reply-To:     Don Hanson <dhanson928@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Don Hanson <dhanson928@GMAIL.COM>
Subject:      Re: More Fuel Pump Weirdness - Has Mercury gone retrograde again?
Comments: To: David Beierl <dbeierl@attglobal.net>
In-Reply-To:  <4bcf6177.26bb8d0a.771a.ffffb0c2@mx.google.com>
Content-Type: text/plain; charset=ISO-8859-1

  I have a Jetta powered van, converted from diesel.  Mine uses a Vanagon
fuel set up.  It's Digifant, just like the Jetta/Golf/Rabbit 1.8liter gas
motor uses.  If your motor is from a digifant car, it should be able to use
Vanagon parts, but I often cross check to make sure.

  I was just now under my van replacing the fuel filter and re-checking the
lines.  My pump was beginning to make some noise so I did the 'blow back
into the gas tank' deal and I added a second inline filter between the tank
outlet and the fuel pump (bosch Vanagon pump) inlet.  Mine is real quiet
again..no pump humm..  The pump on mine is mounted on the right side frame
rail under the van.  It is actually lower than the tank outlet, but I don't
know if that is important.  The system is 'pressurized' from the pump on to
the engine all the time the engine is running.
don hanson

On Wed, Apr 21, 2010 at 1:28 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 03:27 PM 4/21/2010, Pat Sloan wrote:
>
>> There is a universal fuel pump available, which does both the pulling
>> (from
>> the tank) and the pushing (into the engine). My mechanic wants to install
>> this and it sounds sensible to me.
>>
>
> Does your mechanic know that the pump has to supply at least 50 psi
> working pressure?
>
> The standard pump pulls fuel from the tank very nicely -- it's a
> positive-displacement pump and would likely pull at 100 psi except
> that gasoline vaporizes at much less pressure.
>
> On the gasoline tanks there's a filter "sock" over the outlet line
> inside the tank which can get clogged.  I think the longterm solution
> is a new tank, but blowing compressed air into the outlet can blow
> some of the crud back into the tank.  I strongly suspect that this is
> your issue.
>
> Yours,
> David
>