Gas smell with 1/2 Tank [but no leaks] - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-13-2006, 02:21 AM   #1
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Default Gas smell with 1/2 Tank [but no leaks]

Lately I've not been able to fill Bonnie up past the 1/2 full mark without getting a gas smell :(
There are no obvious leaks/ no dripping, just an overall gasoline odor
What can I check to track down this issue?...Of course I can just keep it under a 1/2 tank, but it'd be nice to be able to fill her up for road trips
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Old 07-13-2006, 02:37 AM   #2
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Under your airbox is a round canister in the LF fender. This is the 'charcoal canister' or Evap recovery system. It takes fuel vapors from your engine and sends them back to the fuel tank.

Check all the vacuum lines to and from it.
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Old 07-13-2006, 10:53 AM   #3
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I second Bill'* suggestion about the fuel vapor canister and its connections.
And see if your nose can tell the general area where the smell is the strongest, to help you know where to look.
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Old 07-13-2006, 11:17 AM   #4
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I third the canister idea. had this problem last year, exact same problem actually. Found a snapped line in the engine bay, right by the RF tire.
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Old 07-13-2006, 12:43 PM   #5
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On tamara'* 95 the gas smell was stronger on the back.. no signs of gas leak till you jack up the car.. it was the top of the fuel tank
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Old 07-13-2006, 08:28 PM   #6
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Thanx for the input guys: I'll check out the cannister....Is there any chance that it could be related to the Fuel Pressure Regulator?...or would it be smelly all the time if there was a FPR issue?
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