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
|