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Leaking gas thru the exhaust - 300 Chrysler Cars & Trucks

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Raw unburnt gas?

In what motor?

Need some details lots of them.

Posted on Dec 02, 2012


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Posted on Jan 02, 2017


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I smell gas in the cabin of my 2008 chevy impala, it has 70,000 miles ... the smell wont go away any answers??

smell gas in the cabin Kenny, Fuel line is probably leaking, would have checked immediately by a qualified tech. This could be extremely dangerous if fuel is spraying/leaking on hot surface such as exhaust.

Mar 31, 2016 | Cars & Trucks

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Why do I smell gas and it's leaking from the exhaust pipe?

If you have raw fuel coming out of the exhaust pipe , you have real issues. There are a couple reasons this can happen.

1. You have a dead cylinder and the fuel is not being burned and is exhausted thru the tailpipe. This is unusual since most of the time if this occurs during operation the catalytic converter is hot enough to burn off the excess fuel.

2. You have a frozen injector and it is leaking into the cylinder after shutdown. Hard to believe this though, as you'd need a good bit of fuel to fill a cylinder to where it could flow out through an open exhaust valve. Usually the fuel would wash down past the piston rings first into the oil pan.

Feb 14, 2016 | 2000 Oldsmobile Alero

2 Answers

There is smoking coming out of my dashboard when I start driving. what wrong?

Smoke is never a good thing. If the smoke smells like burning plastic, you probably have an electrical problem somewhere under there and should stop using the vehicle immediately and get it to an auto electric shop for repairs. Waiting could cause failure, or worse, fire. If the smell is exhaust-like, then you may have an exhaust leak under the hood and it is coming in thru the ventilation system. This should be checked out quickly, since carbon monoxide, present in engine exhaust, is a toxic poison that can kill if the concentration gets too high. If you must use the vehicle with exhaust gases entering the passenger compartment (and it is never recommended!), ensure all the windows are open to get plenty of fresh air, regardless of the weather conditions outside -- cold and wet is better than warm, dry, and DEAD!

Dec 30, 2015 | 2003 Ford Taurus

1 Answer

Why is gas leaking out of my muffler?

Because the engine has an over-rich condition that is causing liquid fuel to pass completely thru the engine and get pumped out the exhaust. This is an extremely dangerous condition for many reasons.
1 - leaking fuel in a usually hot exhaust system can ignite, explode its fumes under the vehicle, or subject passengers to hydrocarbon fumes,
2 - if enough fuel is in the exhaust to leak oiut a muffler...and it came thru the engine, there is a distinct possibility of internal engine damage occurring at any time. The pistons normally compress a mixture that is more than 85% air. Air is compressible (meaning you can make it physically smaller by squeezing it at great pressure). Liquids by their nature ARE ABSOLUTELY NOT COMPRESSIBLE!!

What this means is if you have a leaking fuel pressure regulator (kinda common on older ones) or leaking/stuck injectors (less common but still happens) or simply a defective fuel control system that is commanding ridiculous amounts of fuel (rare!), if it exceeds the compressible space in the cylinder for incompressible fuel volume,,,something will break or bend and quite possibly destroy the engine.

3 - if you have enough gas to flow liquid out the exhaust, you are at the very least damaging the catalytic converter which can run hundreds to even a couple of thousand dollars to replace. Further, your mileage is AWFUL right now because despite what people think, cars run on very small volumes of fuel. as in an eyedropperfull per rpm. Now imagine 100x normal fuel useage. Thats probably what you have to have it leak out a muffler. Think prevention, in addition to destroying the engine, it kills mileage, performance, detsroys cats and O2s, rings, seals, valves, sometymes purge systems or pcv systems. It should be repaired asap to prevent more costs si\oon.

May 04, 2015 | 2000 Ford Taurus

1 Answer

Exhaust smell coming in from vent

In most cases fumes coming into the cabin thru the vents is from a leak near the engine. If the exhaust is leaking around the engine it should be fairly loud.

Feb 11, 2014 | Dodge Durango Cars & Trucks

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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

I have a 2001 hyundai sonata, I have a light that is coming on, in the manual it says gas, exhaust light, what is that?

emmission light.
there is a small vapour leak in the fuel sytem of your car.
this doesn`t mean your leaking liquid gas -only a small amount of fuel vapours.
the emmission system of today`s vehicle are very sensitive, and when the car`s computer monitors this, it will display this information thru your dash warning light.
yor car is still safe to drive, but eventually you will have to fix this problem in order to pass a drive -clean -emmission test. See your service repair shop for further diagnostics..

Feb 28, 2011 | 2001 Hyundai Sonata

2 Answers

I have a 97 merc cougar xr7 4.6 v8 I had a weird vibrating hesitation while accelerating thru the gears. It feels like it's almost running on 7 cylinders. I opened the hood and manually reved the engine...

i've been telling people exhaust leak for their problems all night... and you know what... i think it's an exhaust leak =)

seriously check everything from the block to the manifold and look for anything not connected. If you can smell strong exhaust under the hood as opposed to standing behind the car, or if your air filter get dirty incredibly fast, or if your performance degrades (generally cuz i know cars are touchy and weird) as your foot pushes on the gas (not necessarily higher rpm, but actually burning more gas) particularly when it gets hot, that really might be it.

Feb 15, 2011 | 1997 Mercury Cougar XR7

2 Answers

ES 300 burning gas - coming out exhaust

sounds like a head gasket leak if the car is leaking gas DO NOT drive it if the gas is hitting the exhaust it will catch fire

Aug 08, 2008 | 1992 Lexus Es 300

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