Sam,
I'm stumped  A google search revealed "insufficient fuel" as a possible
cause. Said to check for holes in fuel line on inlet side of pump. Let us
know what you find out. .
Ken Lewis
http://neksiwel.20m.com/
in statu viae

----- Original Message -----
From: "Sam Payne" <bungeegull@HOTMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, July 15, 2010 5:19 PM
Subject: Re: [VANAGON] fuel pump producing bubbles

> The injectors were cleaned recently, and have only seen about 3,000 miles
> since. Also, the fuel
> pressure with the pump running tests dead on, and the residual pressure
> stays up for long
> enough.
>    I haven't tried disconnecting the O2 sensor, and will. Thanks for the
> suggestion.
>     But why the bubbles?
>
>        thanks, Sam
>