Why can I smell gas when I open the sunroof or windows?

1997 BMW 318
136,000 MILES
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NIBS425
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  • 4 POSTS
the smell of gas when the sunroof is opened and or windows in a 97 bmw 318ti. No smell of gas when windows are closed also no smell of gas outside the vehicle.
Jan 9, 2012 at 8:04 AM
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FIXITMR
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you must have external leak? any dripping on ground when parked? any smell when you leave /enter car?
Jan 9, 2012 at 10:06 PM
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NIBS425
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No dripping on the ground. When I exit the vehicle there is no smell, also no smell inside. It's only when I open the sunroof. I stood close to the gas tank/ cap and the smell is not as strong as when I open the sunroof. It's weird.
Jan 10, 2012 at 12:12 PM
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FIXITMR
  • ✓Experienced Mechanic
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must be some kinda leak or venting going on somewhere. does everyone smell it or are you sorta sensitive in that way?
Jan 10, 2012 at 12:16 PM
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NIBS425
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Everyone smells it. It's gone as soon as the roof is closed
Jan 10, 2012 at 12:23 PM
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FIXITMR
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dont do it with side windows?
Jan 10, 2012 at 12:25 PM
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NIBS425
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No it doesnt. What i noticed is that when all three are opened the smell tends to disappear after a while. When I open the sunroof on it's own, instantly you can smell the gas.
Jan 10, 2012 at 12:28 PM
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DOCHAGERTY
  • ✓Experienced Mechanic
  • 9,606 POSTS
An inspection of the fuel lines and vapor lines and return lines is in order.
Jan 10, 2012 at 7:34 PM
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