Why does your exhaust backfire on acceleration?

Exhaust backfire during acceleration typically occurs due to an imbalance in the air-fuel mixture, often caused by a lean mixture (too much air) or unburned fuel igniting in the exhaust system. Other factors can include ignition timing issues, a malfunctioning fuel injector, or exhaust leaks. This phenomenon can also happen if the engine is running too rich, leading to unburned fuel entering the exhaust. Proper tuning and maintenance can help prevent backfiring.