Fuel injector mechanical failure

Common failures include mechanical and electrical failures. Mechanical failures include fuel injector spool stuck, fuel injector blocking and leakage, when the above faults occur in the fuel injector, it will cause mechanical action failure, which affects the normal operation of the engine, and sometimes even cause serious engine failure.
Injector needle valve stuck
The work of the injector is sent out by the engine control unit, and the electromagnetic coil of the injector is energized to produce a suction force to drive the needle valve of the injector. Because the gap between the needle valve and the seat is blocked by the residual adhesive, the needle valve operation is astringent and cannot be opened normally, thus affecting the normal oil injection. When the needle valve of the injector is stuck, the engine will have some symptoms, such as difficulty in starting, unstable idle speed and poor acceleration. The main reason for the fuel injector stuck is the use of inferior gasoline, because of the paraffin and gum in inferior gasoline, resulting in the fuel injector needle valve stuck.
The fuel injector is blocked
Injector blocking failure can be divided into internal injector blocking and external injector head blocking. The reason for the internal blockage of the injector is that the impurities and dirt mixed in the gasoline block the movement gap of the needle valve inside the injector, so that the mechanical action of the injector is abnormal. When the fuel injector is blocked, the engine will correspondingly start difficulties, idle instability, poor acceleration and other symptoms, and even cause serious engine jitter, and lead to the occurrence of abnormal wear of related mechanical components.