Bob:
Since running with the cap open still resulted in a sputtering motor, I
think
the restriction in the vent line is a red herring.
Instead, two possibilities come to mind - vapor lock, or a fuel pump on
the
way out. Anyway, both relate to the fuel delivery side of the equation, not
the vent line. I don't know if the vent line is one way or not, but I
recommend you set aside that one for later. Consider rebuilding your fuel pump
and making sure that your fuel line is properly routed and not touching any
source of heat in the engine compartment. Also, you should insure the fuel
line from the tank is free from restrictions.
Vance
Vance Navarrette
Cogito Ergo Zoom
I think, therefore I go fast
-----Original Message-----
From: 6pack-bounces@autox.team.net [mailto:6pack-bounces@autox.team.net] On
Behalf Of robert fabie
Sent: Monday, April 27, 2009 6:05 PM
To: 6pack@autox.team.net
Subject: [6pack] Venting Problem Causes Fuel Starvation
Hello List:
These facts I know to be true: Visually and according to the gauge, there
was just under 1/4 tank of gas in the tank. The filter is not clogged. The
gas tank was rebuilt two years ago and it is not believed to be clogged.
Recently, my engine began sputtering and surging as if running out of gas,
then sputtering and finally dying. I pulled to the side of the road for a a
couple of minutes. I noticed the fuel filter was empty. When I levered the
primer on the fuel pump, it didn't feel as if there was any suction and no
gas was making it to the filter. After a few minutes, gas appeared in the
filter and the car started and ran for a while before again sputtering to a
halt. Believing that it might be a venting problem, I flipped open the gas
tank cap and thereafter, noticed fuel filling in the filter. The car drove
normally for a few miles and then sputtered again. I topped off the gas tank
and then drove 40 miles without another sputter.
<snip>
Many thanks,
Bob Fabie
'75 TR6
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