The pressure regulator is also the relief. In order for the pump to have a
relief it would need another hose for the relieved fuel to go back to the
tank.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Sam Payne
Sent: Friday, July 20, 2007 4:17 PM
To: vanagon@GERRY.VANAGON.COM
Subject: fuel pump relief valve?

Does anyone out there know if an '86 vanagon fuel pump has a built-in
pressure relief valve? If it does, what should maximum pressure be before
the valve opens? I found no mention of this in Bentley.
     I pinched shut my fuel return line expecting to see pressure relieved
at about 80 lbs. but it climbed to 100 before I released the hose, worried
about popping a line off or damaging the system. Seems to me there must be
a relief valve since it's common in other FI systems.

                            Thanks for your help,   Sam