2003 Chevrolet Cavalier Logo
Pernell Posted on Jan 17, 2013
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Why would I get a gas fumes smell when car is sitting idle or just been shut off. Cannot find any leaks in gas tank or lines

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Jerome Minks

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  • Chevrolet Master 3,103 Answers
  • Posted on Jan 17, 2013
Jerome Minks
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Joined: Jan 13, 2013
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Gas is a very high evaporative liquid..fumes extremely strong..if overfull it will smell..and if emissions equipment has issues it will smell also.. when the engine gets hot, any gas present will vent off until the engine cools..thats the fuels evaporative nature..still keep an eye out for issues..

5 Related Answers

240cpa

  • 548 Answers
  • Posted on Aug 06, 2011

SOURCE: REPLACED FUEL TANK WITH USED

Sounds like a vent line or vapor recovery line was not plugged in correctly or left loose.

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Anonymous

  • 1 Answer
  • Posted on Mar 19, 2010

SOURCE: 2005 impala smells like fuel at start up and while

its your fuel pressure regulator. pain in the rear to change. its the small brass looking thing next to the throttle with a vacuum line going to it . the part cost me 50$ and i paid a guy $ 75 to put it in. worth every penny. looks easy to change yourself, but not as easy as it looks.

co7196

Ned C Cook

  • 3433 Answers
  • Posted on Jul 11, 2009

SOURCE: I'm smelling gas fumes outside my car. I can

vapor recovery system, should clear itself, some liquid fuel got into the vapor system. Avoid topping off the fuel tank.

Anonymous

  • 122 Answers
  • Posted on Jan 11, 2011

SOURCE: the smell i'm having is

if inded the smell of exhaust is getting into your car i would suggest not driving it until it is properly checked by a licensed meachanic. it could be entering through your heater/AC blower and in return be fatal if left untouched for a period of time

victor hamilton

  • 18 Answers
  • Posted on Mar 01, 2012

SOURCE: Help with gas fumes smell

Was fuel smell present before you had fuel pump replaced? If yes I would sugest you drop tank and see if fuel vent hose is plugged forcing fuel back pressure line to vent through cap. If fuel smell was not present before you replaced fuel pump and seal. I would suggest you drop tank back out and check all fittings and hose conections. also if you still have old sending unit you could check to make sure they are exactly the same. As Sometimes you have to pull relief valve from old sending unit and install it in the new one, as some sending units wont have one in it. and some will have one that is regulated at a different fuel pressure. hope this helps Vic

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We also own a 2005 chevrolet impala with strong gas fumes, inside of the car driving or just idling..also fumes are strong when the car is just idlin. Took it to the mechanic and put the car on the rack,...

I would have someone check under the front of car while engine was running. Maybe then a gas leak could be spotted. Did he check the charcoal canister-it's a gas vapor collector from the gas tank, and maybe located at front of car. If the canister is full and not working to purge the canister and send the collected fuel and vapors into the engine, it might be what you are smelling.
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This sounds like your evaporative emissions system acting up. Has the check engine light come on? There should be a charcoal cannister that filters the vented air/fumes from the fuel tank. If a vacuum or vapor line is broken, or removed.. or if the charcoal canister is depleted, you'll get the gas smell.
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