A fuel injector is a device that sprays fuel into an internal combustion engine. It is an important part of the engine, as it helps to ensure that the engine runs smoothly and efficiently. There are a few different ways to check if a fuel injector is working properly. One way is to use a fuel pressure gauge to measure the fuel pressure at the injector. Another way is to use a stethoscope to listen for the injector clicking. If the injector is not clicking, it may not be working properly.
It is important to check fuel injectors regularly to ensure that they are working properly. A faulty fuel injector can cause a number of problems, including: