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Date:   Wed, 28 Jan 2004 17:44:37 EST
Reply-To:   THX0001@AOL.COM
Sender:   Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:   George Goff <THX0001@AOL.COM>
Subject:   Re: Fuel Pressure a bit high -- OK???/Probably
Comments:   To: xtabe@YAHOO.COM
Content-Type:   text/plain; charset="US-ASCII"

In a message dated 1/28/04 4:11:40 PM, xtabe@YAHOO.COM writes:

<< Anyone else have a reg like this? Did you change it? Did the engine's running improve? >>

Tabe,

Here my story:

This past summer, my van smelled like it was running a little fat. About that time I read the words of wisdom regarding fuel pressure regulators from one of our many resident experts. He said the fuel pressure should be 29/36 psi spot on; anything else was unacceptable and demanded that the fuel pressure regulator be changed. When I checked the fuel pressure of my van, I found it to be 32/38 psi. I changed it out for a used one I had and I found the pressure to be very nearly the same.

The gauge I used was of industrial quality (USG) but to make sure, I checked it against a very high quality gauge which had been calibrated at some point in its existence. At 20 through 50 psi they were in exact agreement. Wanting to obey the Voice of God, I bought a new fuel pressure regulator. Well, surprise, surprise. When I checked the new regulator it showed 32/38 psi.

The specs for the fuel pressure regulator per the Bentley call for APPROXIMATELY 29/36 psi. Is it reasonable to say that APPROXIMATELY means +/- 10%? So, 26-32/32-40 should be APPROXIMATE enough. I think that if the fuel pressure regulator is queefed out, most likely it will show a high pressure which does not change with the application of the vacuum.

So, validate your gauge and save your money.

George


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