Why go through troubleshooting extremes? Did you check the fuel pressure at
the tee? If you got anywhere near the proper pressure there, fuel is not
your problem. Yes, the return from the regulator will flow a lot less than
an open pump. After you get the engine started, check the pressure again
with the engine at various speeds. It will be obvious if the pump can not
keep up. Usual restriction is in the suction screen in the tank.

Dennis

>From: Don Spence <dkspence@TELUS.NET>
>Reply-To: dkspence@TELUS.NET
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: No Start 83.5: Fuel pump test?
>Date: Tue, 17 Jul 2007 23:50:14 -0600
>
>The saga continues ...
>
>I did two fuel pump volume tests today, one at the pump and one at
>the return outlet of the fuel pressure regulator.  Direct from the
>pump 30 seconds running delivered over 750 ml of fuel.  At the fuel
>pressure regulator return fitting only 25 to 40 ml ( I did this one
>three times).
>
>I then blew out the fuel line, engine to pump, with 40 psi compressed
>air. Still only 25 ml.  I'm thinking I have a clogged fuel line..
>Make sense?
>
>  What's involved in replacing this?
>  TIA
>  Don