What are the symptoms of diesel car injector failure?

[LaRuby]

Engine shaking, increased exhaust emissions pollution, difficulty starting or even stalling, engine misfire, and black smoke from the car exhaust. Below is relevant information about fuel injectors: 1. Fuel injector concept: A car fuel injector is a simple solenoid valve. When the electromagnetic coil is energized, it generates suction force, lifting the needle valve to open the injection hole. Fuel is sprayed at high speed through the annular gap between the needle valve head and the injection hole, forming a mist that facilitates full combustion. 2. Fuel injector cleaning: As one of the key components of an electronic fuel injection engine, the performance of the fuel injector significantly affects the engine's performance. A clogged fuel injector can severely impair the car's performance. The clogging is caused by carbon deposits in the engine accumulating on the fuel injector or impurities in the fuel blocking the injector's pathway. After driving for a period, the fuel system will form certain deposits.