The tank will collapse before lack of venting starved the pump.
BTDT recently with a brand new tank.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Geza Polony
Sent: Thursday, February 16, 2006 5:29 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Sucking sound--Not--Or?

Trying to determine if there's a fuel starvation prob on ye olde
vanagon, I
stop the car, leave it idling, take off the gas cap and listen for a
sucking
sound, as in "this administration s...." (OK, wrong list.)  I don't hear
much, if any, noise from the gas cap removal.

Question: if there is a vacuum problem keeping the fuel from pumping
correctly, how much of a sound would I hear? Big noise? Or is it rather
subtle, something that could be imperceptible with cars going by, etc.?