Date: Wed, 6 Oct 2010 15:59:14 -0500
Reply-To: Tom Hargrave <thargrav@HIWAAY.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Tom Hargrave <thargrav@HIWAAY.NET>
Subject: Re: Fuel Filters vs Fuel Strainers
Content-Type: multipart/mixed;
A strainer is just a coarse filter.
If you put a filter ahead of the pump it will plug up faster with the
stuff a strainer would pull out.
Tom
www.towercooler.com
Sent from my Verizon Wireless Phone
-----Original Message-----
From: John Rodgers <inua@CHARTER.NET>
Sent: Wednesday, October 06, 2010 3:39 PM
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Subject: Fuel Filters vs Fuel Strainers
In working with my two vans that were stored for 10 years, I have had
to deal with many issues. One was getting the fuel delivery system
working again. This included opening it up, and flushing all the old
fuel and junk from it. The injectors were frozen and would not work, so
had to send them out for servicing. They work fine now. And the fuel
pump on my Carat was seized so that had to be dealt with. By removing
the pump, and spraying carburetor cleaner into it and allowing it to sit
over night, then repeating the process, the pump freed up and now works
just fine.Then there was the issue of the fuel filters.
In as much as I'm having idling problems, I got out the Digifant Fuel
Injection System manual to study. I found interesting remarks concerning
the fuel filters. In as much as there has been a good bit of talk on
this list about the large filter after the pump, and the small filter in
front of the pump - here is what the book has to say about them.
************************
*Fuel Filters*
Two types of filters are used on the Digifant system.
One is a square _*plastic fuel strainer*_ which is mounted before the
fuel pump *_to __protect the pump_* from foreign particles.
The *_main fuel filter_* is a metal cylinder which mounts behind the
fuel pump. *_It has a finer filtering mesh to protect the fuel injection
components._*
Both are lifetime filters and do not require replacement under normal
circumstances.
*********************
Of interest to me is the different function of the two filters - the
first to protect the pump. the second to protect the FI components, ie,
the injectors.
I note that one is a fuel STRAINER, while the other is a fuel FILTER.
Quite a different between a strainer and a filter.
I have read that the square strainer can be left out, but after reading
this - I would not. Each filter/strainer serves a different and distinct
purpose and therefore both need to be in the fuel system..
Just my $0.02.
John
--
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com
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