Why Does the Exhaust Pipe of a Natural Gas Engine Spit Fire?

[SanKhloe]

Because some copper wires in the low-voltage wire of the car's distributor are broken, causing insufficient voltage. Specific reasons: When some copper wires in the low-voltage wire of the distributor are broken, the ignition voltage provided to the spark plugs is insufficient, leading to incomplete combustion of gasoline. The unburned fuel-air mixture enters the exhaust pipe and ignites when it encounters sparks in the exhaust gas, causing the exhaust pipe to spit fire. Reasons for backfiring: When the engine temperature is low, although starting is more difficult, the engine can operate normally once started. As the engine temperature rises, the temperature of the ignition coil also increases, and its resistance rises with temperature, resulting in even more insufficient high-voltage electricity generated by the ignition coil. The high-voltage spark becomes weaker or even intermittent. Due to the intermittent sparks, the unburned combustible mixture in the cylinders is expelled into the muffler. When it expands in the muffler and encounters sparks in the exhaust gas, it detonates, manifesting as backfiring from the muffler.