What are the symptoms of fuel injector leakage?

[LaLaila]

The symptoms of fuel injector leakage are: 1. The engine idles unevenly; 2. Gasoline dripping into the cylinder will make the air-fuel mixture too rich, causing difficulty in engine starting; 3. Increased engine noise; 4. Unresponsive throttle and unstable acceleration; 5. Black smoke from the exhaust pipe and accelerated wear of piston rings. The causes of fuel injector leakage are: 1. Incomplete contact between the injector hole and the needle valve under the pressure of the adjusting spring; 2. Failure of the pressure spring, resulting in insufficient closing pressure; 3. Poor gasoline filtration. The fuel injector is an electromagnetic valve that controls the formation of fuel spray entering the engine by opening and closing, which helps the fuel burn more completely.