How to check if the fuel injector has no signal power? Do you need to replace the fuel injector if one is broken?

As the supply terminal in the fuel supply system of the engine, the fuel injector plays an important role in injecting fuel into the cylinder at a certain pressure and timing. This shows its importance to the engine, so what happens if there is no signal from the fuel injector? Should I replace all the injectors if they are broken?

How to check if the injector has no signal power

Generally, each fuel injector has a power line controlled by the main relay or fuel pump, and a signal line controlled by the engine computer ECU. When working, it must have a power supply and ECU control signals to work. If the signal line controlled by the ECU has no control signal, then you should check whether there is an abnormality in the ignition system, otherwise the ECU will not give a fuel injection signal.

Do I need to replace all the injectors if they are broken?

Under normal circumstances, if the fuel injector is broken, only the broken one needs to be replaced, and it is not necessary to replace all of them.

Of course, some people may say that the current engine uses high-pressure common rail technology, mainly through the electronic control of the fuel injection nozzle to achieve precise control of the injection time and fuel injection volume, and in the process of long-term use, the accuracy and efficiency of the fuel injection nozzle Will slowly fall. If only one of the fuel injectors is replaced, the performance of the new fuel injector is better than that of the old fuel injector in all aspects, which will cause uneven working power of each cylinder when the engine is working, resulting in engine jitter, Power drops. but! This is often a set of rhetoric in theory, and we do not have to follow this rule completely in the actual application process.