Question about 2003 Chevrolet Cavalier

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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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  • Chevrolet Master
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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..

Posted on Jan 17, 2013

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Posted on Jan 02, 2017

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SOURCE: REPLACED FUEL TANK WITH USED

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

Posted on Aug 06, 2011

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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.

Posted on Mar 19, 2010

co7196
  • 3433 Answers

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.

Posted on Jul 11, 2009

loud_pipes69
  • 122 Answers

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

Posted on Jan 11, 2011

  • 18 Answers

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

Posted on Mar 01, 2012

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1 Answer

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Check at the gas tank find the fuel line and fell it all the way if you hit a wet spot that will be your leak! also look at the gas tank make sure you have no leaks there.

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Possibly the vent line that routs fuel vapors from the gas tank to the charcoal canister has come loose. Check the hoses and lines around the fuel tank for leaks. There will be a fuel feed line to engine, a fuel return line from engine, and the evap. line or hose that carries the fuel vapors.

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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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is your purge canister working correctly or does it cause the fumes to stay in fuel tank and smell from the tank cap. Check when the car is off by removing the filler cap whether you have a pressure in tank. this might cause the smell,unless there is a small leak not noticeable somewhere.

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If it is a gas leak and not an exhaust leak, let it sit in park and look under the car for the leak (above and on the floor). At times it is the lines of the sending unit found above the gas tank. Do not drive it! The leak can catch on fire ( the leak can spread over hot parts of the car while driving). If you find the leak, have it towed to your mechanic for repair.

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I have a 2002 Ford Taurus SES; It doesn't always happen but I am smelling fuel fumes inside the car after it sits for awhile. Sometimes the odor is stronger depending on where I get fuel from. I...


auto tech for 15 years you have a crack on the fuel pump return line on the fuel pump assemble I have done many Taurus with the same problem the fuel puddles up on top of the tank and smells bad replace the whole fuel pump assemble and the smell will go away.

Jul 07, 2011 | 2002 Ford Taurus

1 Answer

When you fill the gas tank you can smell fumes but it is not leaking on the ground.


There are, of course, many possibilities, but if you are smelling fumes it is likely that they are coming from the engine compartment. If you smell the fumes when you first start the car, it may be that one or more of your fuel injectors have begun to leak. They are the four cylindrical devices connected to the fuel rail down low in front of the cover that is marked PGM-FI. You would be able to see dampness on one or another if it is leaking. Another possibility is a leak in the fuel line itself regarding its several connections. Without a manual and pics, it is difficult to indicate the positions of many parts, but if you trace your fuel line backward from your fuel rail to the fuel filter and so on, you might be able to find a leak. A VERY small amount of fuel will allow you to smell it, so I wouldn't expect to see gas flowing out somewhere. Sometimes, simple overflow from filling the tank will give you a short-term odor.
Sorry I can't be more help. A Haynes manual would be a good investment.

Oct 13, 2009 | 1992 Honda Accord

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