The impact of the fuel water separator leak on the car:
1. A broken fuel water separator will cause unstable or weak acceleration of the engine and emit black smoke. If there is a problem with the fuel water separator, the water and impurities in the diesel fuel will wear and tear the plunger and even parts in the fuel injection nozzle until the fuel injector is stuck. At the same time, explosive damage will occur to the spherical surface of the valve assembly, resulting in an increase in the amount of fuel in the injector. It will cause unstable or weak acceleration of the engine, or emit black smoke and other malfunctions. In severe cases, it will directly damage the engine;
2. It is easy to produce carbon deposits. If the fuel water separator is damaged, the water and impurities in the diesel will pass through the filter device, and then accumulate in the intake valve, intake duct, and cylinder, forming hard carbon deposits, which will affect the operation of the engine, and in severe cases, it will cause the engine to be destroyed. Damage to the fuel water separator will cause valve carbon deposits, and valve carbon deposits will cause abnormalities such as difficulty in starting the engine, unstable idle speed, poor acceleration, rapid refueling and tempering, excessive exhaust gas, and increased fuel consumption. In severe cases, it will cause engine damage;
3. The engine emits white smoke. The damage of the fuel water separator will cause the engine to emit white smoke, because the water in the fuel will turn into water vapor when it is burned, so white smoke will appear. The water vapor in the white smoke will damage the high-pressure fuel injectors, resulting in insufficient engine power, and sudden shutdowns. In severe cases, the engine will be directly damaged.