Steve
Fuel injected cars do have highly pressurized fuel systems, don't
they?
There is some pressure in today's systems. That is why you can get
a check engine light after filling up; the gas cap is not on tight. OBD II
vehicles do a fuel system check to register pressure in the fuel system.
The system is not highly pressurized, only from the fuel pump to the
regulator. The return line to the tank will not work correctly if there
is a large amount of pressure in the tank and you will get a fuel starving
condition. The computer controls all this and there are a couple of valves
that sometimes go bad or hang up which also give you a check engine light.
Ron Fraser
-----Original Message-----
From: owner-tigers@autox.team.net [mailto:owner-tigers@autox.team.net] On
Behalf Of Steve Sage
Sent: Sunday, June 12, 2005 2:54 PM
Cc: Tigers@autox.team.net
Subject: Re: Gas Smell
Here's an idea. I wonder what the theory of that little vent hole in the
gas filler car is. It's not big enough to release a huge amount of
pressure at once. Maybe the fuel system is in fact supposed to be
partially pressurized when you're driving, and the very small "pinhole"
vent in the cap just releases a certain amount of pressure to keep it
within a certain range. Fuel injected cars do have highly pressurized fuel
systems, don't they? So maybe some amount of pressurization is a
good thing.
Steve Sage
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