A backfire can be caused by a fire or explosion that takes place when fuel that is not burned in the exhaust system gets ignited, even though there is no flame inside the pipe that is used to exhaust. There are times when a flame is observed when a car is backfired however, most of the time you’ll only hear a loud pop sound followed by a loss of power and forward movement.

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Unburnt fuel could result from a range of mechanical malfunctions Here are a few of the most frequent causes for a backfire

In the event that your vehicle is receiving greater amounts of fuel than it requires and a high ratio of air to fuel can be the result. If your car is left with fuel in its exhaust and the cylinders, this fuel burns up explosively and makes an eerie sound.

The engine timings are wrong

In particular, we are talking about delayed timing, which triggers the backfire. The delayed timing indicates that the ignition process of the engine starts at a later time in the combustion chamber and then ignites the fuel when the exhaust valve opens rather than waiting until it is fully open.

Cracked distributor cap

Vehicles that do not have ignition coils attached to their spark plugs are equipped with a distributor cap as well as a wire set that distributes the electrical impulse to the spark plugs. If the cap is damaged the moisture can enter, which causes that the spark electrically to leap into the incorrect cylinder, leading to the backfire.

Carbon tracker in spark plug wirings

Carbon tracking comes to play in a myriad of circumstances, including the initial scenario involving sparks caused by wires in the cap of a distributor, which may begin to move from one wire to the next rapidly, and carbon tracks are formed that is basically an alternative route to the spark.

The other scenario that is most commonly encountered is that the spark plug’s wires or coils for ignition are placed directly on the spark plug and cause an electrical current to break its paths and leave fuel behind within the cylinder. The next time a spark is created it strikes the fuel that was left behind, and quickly burns, and the exhaust valve is opened and you get another backfire.

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