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Fuel smell on hot days - 1999 Holden VT

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Smell fuel near carburetor in front.


The carb float chamber is vented to atmosphere and under certain conditions there will almost always be a fuel smell near the carb, especially for those with a developed sense of smell. Petrol is a liquid with highly volatile elements and in hot weather or a hot engine those elements will readily evaporate and then the vapours will drift where they will.

Any abnormally strong or stronger than usual fuel smell should be investigated and while most leaks will be easy to find with a cold engine and cold weather it is worth noting a tiny fuel leak can create a strong smell in mild or hot weather or with a hot engine and be virtually impossible to find.
It will probably be necessary to remove the air cleaner to check for carb flooding and it is also worth noting in the case of an engine driven fuel pump there is a possibility of a leak into the engine crankcase.

Jun 26, 2016 | Cars & Trucks

1 Answer

My car smells like gas when I turn the engine off. The smell is NOT in my car but smells up the garage


Possible leaky fuel injector/regulator/fuel line. Possible disconnected/loose fuel purge/vent line. Possible leaky fuel filler tube or fuel tank. You will need to have the fuel system/lines inspected to determine source of smell. Not something I would put off as a major leak could develop and spill fuel on hot engine/exhaust causing fire

Jul 01, 2015 | Cars & Trucks

1 Answer

Evap emmission,control sys leak


Do not top off your gas tank. The gas is going into carbon canister which is only for fuel vapors to go into (carbon canister opening near the top of fuel neck near the gas cap). Your flooding the fuel vapor canister with liquid fuel; of course you are going to get a sensor message... 'Evap emmission,control sys leak

P0443 The fuel vapor canister reduces that gas smell on hot days outside/inside of car. The fuel vapor canister fillers bad smells from gas tank on hot days when the gas expands and burps fumes through carbon canister filter. From the canister (gas vapor fumes) goes back into the engine to be burned again...it's a closed loop for vapors to be recycled though engine. Don't worry, once the carbon canister dries out and no longer flooded with raw fuel the code should go away...just don't let the top off fuel tank back flow into the 'Evap emission control' carbon filter near the top and close to the gas cap...:)

Apr 20, 2014 | 2000 Ford Mustang

1 Answer

My 1990 ford laser 1.6 struggles to start or will not start on a hot day but will start fine any other time, it also smells of petrol while trying to start, ive replaced the starter motor and put a larger...


Hi is it a fuel injection model or carb? If it is a carb model, I have found the auto choke gets stuck. This will make it start fine in cooler weather but floods the engine on warmer days or if the engine is hot.

Oct 01, 2013 | Ford Cars & Trucks

1 Answer

My 2005 chevrolet cavalier has a problem regarding that gas smell everytime i used it?


If you see no obvious fuel leaks,then have the
Evap System checked out

You may have a bad vent valve

Do you smell fuel on a hot day & near
the back of the car?

Sep 05, 2012 | Cars & Trucks

1 Answer

98 Pontiac Grand Prix GT 3.8 won't after engine warms up


crank pos. sensor or maf sensor ck. the fuel press reg. also

Jun 06, 2012 | 1998 Pontiac Grand Prix

1 Answer

My v6 94 Camry is sputtering.


Poor quality fuel could certainly be the cause of this. Adulterated fuel can have a variety of substances in it, from water to diesel.
If it only started to do this after you last filled with the suspect fuel, have it drained before it causes damage.
Camrys will often leak oil onto the exhaust, from several spots,and that causes a hot smell. I think it may be unrelated to the sputtering.

May 08, 2012 | 1994 Toyota Camry

2 Answers

It sqeeks,and it stops by its self.not by turning left or right ,hand brake,or foot brake pedal.&sometime i smell fuel when i get out of car,sorry cant xplain better.


smell of fuel is completly normal for these GTR's as the fuel tank is basically mounted on the top of the transmission in the rear, Nissan have designed a fuel system and a breathing system so the heat generated by the transmission does not affect performance, but to achieve this there is a strong fuel smell when is hot, and you may have noticed it is very difficult to fill with fuel when is hot, Is normal

Jun 20, 2009 | 2009 Nissan GT-R

1 Answer

Strong gas smell when weather hot- Volvo s90


Inoperative purge valve in EVAP system

Jun 05, 2009 | 1997 Volvo S90

2 Answers

1990 VW Cabriolet Gas Smell and humming from gas cap...The smell and sound happens more frequently on warm/hot days. Gas cap seal has been replaced, but still having problems.


The humming noise is coming from the fuel pump.  Its possible its getting ready to fail.  These start making noise when they are going bad.  The smell can be coming from bad gas cap not sealing up fuel tank properly and or a fuel pump/sending unit seal.  You can pull the back seat bottom out easy enough by removing 2 5mm alan screws that secure it to the floor.  Remove the seat bottom buy pulling out and remove black cover under seat bottom that has 3 philips screws.  you may smell fuel more promanently here.

May 29, 2009 | 1990 Volkswagen Cabriolet

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