Question about 1996 - 1999 Chevrolet Tahoe Exhaust Muffler Kit 15701 Chev

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Sometimes when you turn off the engine it sounds like thetank expans or pops

You can smell gas but its not leaking anywhere

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Your gas cap may be bad, some of the vented gas caps can do that.

Posted on Feb 12, 2014

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Posted on Jan 02, 2017

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Fuel loss. checked fuel line that pinhole was before, no smell, no sign of gas anywhere. took a drive that usually uses 1/4 tank of gas, this time it used 3/4. checked eeverywhere when i got home.


I need year--make--model--engine size to look up vehicle info?
Use a fuel pressure gage, not only check correct fuel pressure, see if fuel pressure will hold for a bit, with everything off. If the pressure drops like a rock, you have a pressure leak. Could be a fuel injector leaking? Where applicable, check fuel pressure regulator vacuum line, if it has gas in the line, the regulator is faulty.
Smell of the crankcase oil dipstick, does it smell like gas? If so, I wouldn't drive it till you fix the problem and change oil and filter as many times as needed to get rid of the gas.
How long since overall tune-up? 02 sensors sensors ever changed? Sometimes a faulty coolant temp sensor may cause the engine to run rich? Are there any driveability issues? Any applicable trouble codes? Don't replace anything unless your testing points in that direction. I can't see anything from here, as far as external leak, anywhere?

Apr 01, 2016 | Cars & Trucks

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I have a 2002 doge caravan that i smell gas sometimes. its running rough and sounds its back firing. when you excelerate it doesnt want to and i hear a popping sound. already changed spark plugs and g


Remove the Engine Air Filter Housing and look under it for a vacuum line that goes back to the gas tank You will get a gas smell at times because this is an open line to the gas tank and evaporation container. It's common for the rubber elbow there to split and cause issues. Check ALL vacuum lines. The increase in air into the fuel system is causing a backfire "popping sound" and a loss of power.

Oct 12, 2014 | 2002 Dodge Caravan

1 Answer

After hot engine wont start and smells like gas


Most likely causes are bad engine coolant temp sensor OR leaking fuel injectors. Bad engine coolant temp sensor will give computer false reading and computer provides wrong air fuel mixture. Leaking fuel injectors will load the engine with raw gas--just like flooding it. Try pushing the gas pedal to the floor and holding it there when cranking when hot. That forces the computer into "clear flood" mode and it shuts off the injectors. If it starts up with pedal down, that would be a sign of leaking injectors.

Jul 21, 2017 | 1999 Dodge Intrepid

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After my car sets for an hour or so. Ill start it its slow to start sometimes dies. Then i smell gas under the hood. Does anyone have any suggestions.


Hi Sean, I'm glad to help!

Sean, the only suggestion I can give in this case is. It sounds like it may be flooding out. This could be because of leaking injectors. What happens is when you turn the engine off the injector will continue to leak into the cylinder until there is an abundance of gas then when you try to start the engine the gas needs to clear before it will start and your smelling all that raw fuel being pushed out of the tail pipe. If you are mechanically inclined then remove the fuel rail and while watching the tips turn the key to the on position. CAUTION: DO NOT try to start the engine, simply turn the key to the on position. If one are more injectors are leaking after turning the key off then replace the leaking injectors. NOTE: Sometimes carbon build-up on the injector tip will also cause then to leak. Hope this helps and have an awesome day Sean.

Apr 09, 2013 | 2003 Kia Spectra

1 Answer

I smell gas but i'm not lossing any.


My first question is - is the check engine light on when you are driving ?
You could have a leaking injector which could be causing fuel to escape thru the exhaust. You could also have a leak in the vent system for the gas tank.
The need for coolant and oil if no leaks are visible usually means the engine is burning the fluids because of an internal engine leak or head gasket problem.

Feb 04, 2013 | 2005 Chevrolet Tahoe 4WD

1 Answer

Gas Smell 99 Pontiac Grand Am


if no leaks in lines, a bad or leaking fuel regulator can cause hard starting, poor fuel economy, stalling, check engine light, gas smell from under hood.

Feb 19, 2010 | 1999 Pontiac Grand Am GT

1 Answer

My 1998 cavalier is running ruff. It's like a sputter....at all speeds. It's worse when I just start it. I don't see anything leaking anywhere. And my check engine light has come on recently. What could...


SOUNDS LIKE THE FUEL PRESSURE REGULATOR IS SLIGHTLY LEAKING. PULL THE VACUUM HOSE OFF AND SMELL THE OPENING FOR GAS SMELL. CHANGE AS SOON AS POSSIBLE.CHECK ENGINE LIGHT MAY BE ON BECAUSE OF O2 SENSOR BEING FLOODED.OTHERWISE, COULD BE A VACUUM LEAK.

Jan 27, 2010 | 1998 Chevrolet Cavalier

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Petrol smell inside of car. This started just resently, its really bad, but not all the time. The car is old but fine, and goes wonderfully well really, but the smell is very worrying. What can it be and...


Gas or anitfreeze are both petrolium based prducts. Check for leaks on both. Antifreeze has a sweet smell and is either green or orange if using Dex Cool (look in resivoir to confirm color or if its low) to diffrentiate the 2.

Oct 02, 2009 | 1992 Ford Escort 4 Door

2 Answers

Acts like its running out of gas, raw gas smell


this suggests you have a fuel leak in the engine compartment. Possibly a leaking fuel manifold (injection rail), or the rubber line from the fuel tank is leaking where it attaches to the manifold. The fuel line to the cold start injector should also be checked. Rubber hoses on older cars become brittle and as they contract from very cold weather will leak. Turn the key to on for 1 minute but do not start the car. Then check under the hood for a raw fuel wet spot where the leak is.

Jan 10, 2009 | 2002 Subaru Outback

1 Answer

99 dodge dakota has gas smell in cab when heater or ac is on


sounds like you need to look through the engine bay and see if your fuel lines are wet anywhere!! There might be a possibilty that you have a leak around the gas tank so jus crawl under the trunk and look to see if it has any kind of wetness around the tank or hoses coming out of the tank!!

Dec 10, 2008 | 1999 Dodge Dakota

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