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What makes flames come out your exhaust?

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2009-11-20 12:04:34
2009-11-20 12:04:34

Usually a product of valve overlap and exhaust. It's basically unburnt fuel coming through and igniting on the hot exhuast tip when it hits the air at the end of the exhaust pipe. In aspirated cars it's large valve overlap which helps scavenging and performance in the top end. Turbo cars, due to the large amounts of fuel at full noise. Normally happens after high RMP then throttle snapped shut.

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Flames will come from the exhaust when raw gas enters the exhaust then ignites. run computer codes for the engine to look for a problem causing the gas to not burn completely.


free flow exhaust with reducing bends


When the driver let's off the gas pedal going into a turn raw fuel gets pumped into the exhaust manifold. The manifold is so hot the fuel ignites and you see flames from the exhaust pipe. It's totally normal.


Flames coming out the exhaust is the result of the exhaust igniting fuel that was not burned inside the engine. Occasional pops of flame can be from backfiring, which shoots out unbirned gas that gets ignited from the heat of the exhaust. On cars without electroinc ignition or fuel injection, which covers all older cars, turning the ignition off while moving and then back on can result in a backfire and flames.


old junky exhaust systems have a lot of debris that catchs fire with high exhaust temperatures


I dirt track race and mine did it once it was because it was running to lean.


Flames change colour according to what is being burnt and whether it is complete or incomplete combustion. Blue flames usually come about due to gas being burnt as that is complete combustion so all of the gas is burnt with no bi-products. Yellow flames however, the ones that usually come about due to wood being burnt come about because of the soot (carbon) produced when it is burnt. The soot burning is what produces the yellow flames. Flames can be all sorts of colours though, for instance, if you burn copper oxide then the flame will be green.


Flames shooting out of race car exhaust pipes is caused by unused fuel passing from the cylinder into the exhaust system and lighting by the heat of the exhaust. Race cars run a different grade of fuel than a normal passenger car so this is common. You have to really soop up a normal car engine for this to happen on a normal car.


Emissions are what come out of your exhaust and 2008+ (usa) have a newer exhaust setup that is suppose to cut down on contaminates that come from your exhaust.


Is you question about how do make it have fire come out or is it why does fire come out. I can answer both just let me know which one you want answered


race cars run a very rich mixture. when the engine dies, the unburnt fuel in the exhaust system catches fire from the heat in the exhaust pipes. when the engine is refired, the fire blows out. Flames come out the exhaust during the deceleration of a racing car because during wide open throttle the intake manifold and intake port are filled with a homogenized air fuel mixture. When the throttle is suddenly closed the velocity of this mixture stops and the pressure drops into a strong vacuum. This causes the fuel to drop out of suspension (in the air) and return to a liquid state. This liquid fuel is drawn through the combustion chamber and ignites when it reaches the hot exhaust valve and pipes resulting in the visable flames from the end of the pipe.


blue flames makes the food hotter and less smelling like smoke


YA - it makes the flames all blu


Not quite sure what you are asking but there are flames with both solid and liquid fuels


Often that can be the result of a sticking injector that puts too much fuel into the engine. The fuel will eventually burn somewhere, and that may be when it comes out the exhaust.


it is called a silencer which makes the exhaust less noisier



Exhaust coming out of the airfilter indicates a possibility of a few things. Motor has jumped time. Burnt Intake Valve It can also be that the valve lash is out of adjustment.


Yes, this is simply showing your car is working, however, what SHOULD'NT come out of your exhaust pipe is red flames. If that is what's coming out, I'd check with mechanic. In general, Blue smoke, engine oil. Black smoke, excess fuel. White smoke, engine coolant.


No.. If anything it makes it slower if you do not have the right muffler or exhaust system on it.


it makes you exhaust louder or " meaner " and some say it causes an increase in horsepower


A misfire will cause flames to come out of the carburettor


That is called condensation. When you start the engine the exhaust system/pipes are cold. When the heat from the engine exhaust passes through the exhaust it makes it sweat. That is normal.


Follow the exhaust off the back of the motor and on the exhaust pipe it is the first sensor you come too.


Cars do indeed produce exhaust, but they are not the only source of exhaust which can come form other forms of transport, house boilers and factories.



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