Mufflers and Tailpipes
Honda Civic DX
Honda Civic EX

What causes backfire through the exhaust while in neutral in a 1994 Honda Civic DX?

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2005-10-21 04:52:14
2005-10-21 04:52:14

first and best thing to find out is if your running rich or not your fuel to air ratio might not be just right. check your oxygen sensor and do a full tune up.

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Unburned fuel in the exhaust system causes the backfire from the exhaust pipe.

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I think you are hearing pressure pops. Not a backfire.

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a backfire is caused by incorrect timing or not enough back pressure in the exhaust pipe

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It is timed incorrectly or plug wires are installed incorrectly.

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I would suspect the spark plug wires are installed incorrectly on the passenger side.

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A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Also check your ignition timing, if it is late and you have a rich mixture you can get a backfire. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound.

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A backfire is caused by many different things. Using the wrong grade fuel will cause a backfire, as the engine's compression ratio is usually too high and will detonate the Air/Fuel mixture, causing a backfire. It can also be caused by advanced or retarded timing. Advanced timing will cause a backfire through the intake, as the spark occurs too early and ignites the Air/Fuel mixture before the intake valve is closed. Retarded timing causes a backfire through the exhaust as the spark occurs after the exhaust valve has opened. Your problem seems to be advanced timing. A backfire is caused by many different things. Using the wrong grade fuel will cause a backfire, as the engine's compression ratio is usually too high and will detonate the Air/Fuel mixture, causing a backfire. It can also be caused by advanced or retarded timing. Advanced timing will cause a backfire through the intake, as the spark occurs too early and ignites the Air/Fuel mixture before the intake valve is closed. Retarded timing causes a backfire through the exhaust as the spark occurs after the exhaust valve has opened. Your problem seems to be advanced timing.

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Useully caused by a backfire thru the exhaust from poor ignition gases built up

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unburnt fuel wich goes to your exhaust, where because of the heat ofcourse is set on fire and then strikes flame out of your exhaust! sorry for my English

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ok, is the backfire through the exhaust or inlet manifold? if its through the exhaust it means ur mixture is to rich, causing unburnt fuel to ignite in exhuast, if through inlet it is a lean backfire, either way if carby in good condition it sounds like mixture screw, to adjust, start car and get to operating temp, wind mixture screw in till car almost stalls then back out 1 and a quarter turns, that's a static point to go from. good luck

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Several things could cause this problem. It could be the timing is set incorrectly, the catalytic converter is plugged, the spark plugs are misfiring, or a burned valve.

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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.

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The valve timing is slightly off. Have a mechanic check the timing. What causes the backfire is the residual gases being set off either by the spark plugs or by the heat of your exhaust.

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A leaking spark plug wire can cause a backfire out of the intake, but the most common cause is a burned intake valve. A burnt intake valve will allow leakage during the compression stroke back through the intake causing a popping backfire out of the intake manifold.

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I will assume you asking about a petrol motor... usually its incorrect timing settings, find out what the timing setting should be, then adjust to suit a leaky exhaust system will also cause this

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Backfire is normally caused by engine out of time, or spark plug wires installed incorrectly.

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Leak in exhaust system perhaps exhaust manifold being sucked in through air intake (grid at lower end of windshield)

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A car backfires because unburned fuel is getting to the muffler. The heat of the exhause system causes the fuel to combust, thus a backfire. I have just been told that the rubber on my exhaust has split - could this be why the car would backfire? I have heard something about air getting into the exhaust could cause a backfire? back fire can be caused by different faults. first is to much fuel because of worn carburetter, or wrong adjusments on carburetter. choke sticking will cause backfire. timing be out of adjustment will cause backfire exhaust leak can cause backfire. bad spark plugs, or plug leads , distributer cap worn of cracked will cause backfire as for fuel in muffler, if it combusted in muffler , the muffler would split open it is not that. and i dont know of any rubber on an exhaust that would take the heat aexhaust manifold gaskets could be problem but if they were rubber they would melt \ is it good or bad to have backfire It can also be done with intentional modification, such as done in ''Keeping Up Appearances'' British sitcom. A fuel line and an oxidizer line are added to the muffler with a manual rubber bulb pump added to the line as the ''backfire button.'' At a point before entering the muffler, the lines have a pair of backflow valves to prevent the flame from racing into the mixture tanks. Squeezing the bulbs dispense a mixture of pure alcohol and an oxidizer into the muffler to create a reaction. For Onslow's car in the TV programme, copier toner was squirted in the tailpipe for a heavy soot effect on the backfire command. Having a car backfire can shake off any parts that aren't bolted completely, and can cause the engine to stall because the pressure of the backfire can temporarily disrupt the exhaust release from the engine. Besides, it would spook horses, cows, or anyone not used to loud noises. So having the car backfire down a Harlem road won't have the same effect, as a car backfiring down a rural city road.

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Your car is running too rich.

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sticky valves. marvel mystery oil in the intake thru a vacuum line while engine is running. it will smoke out the exhaust for a minute and the neighbors will be mad but oh well

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Air fuel mixture out of balance which can have multiple causes. unburned fuel going into exhaust for some reason. Could be a misfire, bad maf, bad injector, etc. If CEL is on, start there.

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This is called backfiring and can be due to a variety of causes, such as incorrect air and fuel mixture or a faulty ignition.

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Backfiring is usually an indication of a lean condition. When it does it during cranking, it's probably timing related.

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"lead" is the Pollutant from motor car exhaust that causes mental disease.

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As with any engine, timing, and also carb problems.


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