I have a 1996 Fleetwood Brghm. 66000 miles. owned it since day one. i get a
smell of gas intermittantly and only when it is cold (like after being in
the garage for a week). it goes away after the car has wormed up. the
dealership could not trace it. a private repair shop discovered that the
flange on top of the tank (where the fuel pump and float assembly attaches)
was warped. we had a new tank put in, they changed the fuel filter, the fuel
lines, checked the manifold for cracks, etc. it went away, then as before,
without anything happening to the vehicle, or any work done on it, it comes
back every now and then!!!. any ideas?!!
Yes. That's normal.
Under the hood there is a round charcoal container with hoses on the top
and an internal diaphragm. One hose goes through a solenoid valve to the
manifold and another goes to the vapor space above the gas in the gas tank,
the tank being sealed. I forgot the govt acronym, but the purpose is to
reclaim the gasoline vapors from the tank. When the engine is running, the
engine sucks the vapors from the tank (and the charcoal, which refeshes the
charcoal) and burns them. When the car is not running, the charcoal
adsorbs the vapors. The charcoal can only hold so much gas vapor and after
a few days any overflow goes into the air. You can't seal it up because
you don't want pressure or vacuum in the gas tank. The system depends on
the car being run frequently. If it sits up, you smell gas. The fumes
won't catch fire. No real problem.
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