A backfire from your car’s engine or exhaust can be alarming but is usually easily fixed. A backfire is an explosion of unburned fuel in the engine or exhaust system, which causes a loud “popping” noise.
A backfire from the engine occurs when unburned fuel in the combustion chamber ignites violently instead of burning steadily. This is often caused by issues with the air-fuel ratio, ignition timing, or buildup of carbon deposits inside the engine.
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