The nozzle can be cleaned and repaired, but if there is still a problem after cleaning, it must be replaced. After the nozzle failure, it will cause the injector to be dirty and blocked, resulting in injection deformation, atomization, fuel injection misalignment, power reduction, poor acceleration, excessive emission and so on.
The method of detecting and judging the electromagnetic fuel injection nozzle is good or bad: detecting the electromagnetic fuel injection valve, the key is to check whether the internal oil circuit is blocked, whether the needle valve is not tightly closed, and whether the electromagnetic coil is working normally.
When testing, you can first use the cylinder-by-cylinder oil cut method to find out which cylinder's electromagnetic fuel injection valve is faulty, and then test according to the following process:
First, connect the 12V power supply voltage to one end of the fuel injection valve wiring seat, and repeatedly touch the other end of the body intermittently, observe whether there is a slight vibration, and listen to whether there is a micro-spray sound