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

Tiny
NIBS425
  • MEMBER
  • 1997 BMW 318
  • 136,000 MILES
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.
Monday, January 9th, 2012 AT 4:04 PM

7 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
You must have external leak? Any dripping on ground when parked? Any smell when you leave /enter car?
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Tuesday, January 10th, 2012 AT 6:06 AM
Tiny
NIBS425
  • MEMBER
  • 4 POSTS
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.
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Tuesday, January 10th, 2012 AT 8:12 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Must be some kinda leak or venting going on somewhere. Does everyone smell it or are you sorta sensitive in that way?
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Tuesday, January 10th, 2012 AT 8:16 PM
Tiny
NIBS425
  • MEMBER
  • 4 POSTS
Everyone smells it. It's gone as soon as the roof is closed
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Tuesday, January 10th, 2012 AT 8:23 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Dont do it with side windows?
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Tuesday, January 10th, 2012 AT 8:25 PM
Tiny
NIBS425
  • MEMBER
  • 4 POSTS
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.
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Tuesday, January 10th, 2012 AT 8:28 PM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
An inspection of the fuel lines and vapor lines and return lines is in order.
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Wednesday, January 11th, 2012 AT 3:34 AM

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