How can you check for fuel injector operation?

To check for fuel injector operation, one effective method is to listen for a clicking sound while the engine runs. This sound indicates that the fuel injectors are functioning and pulsing fuel into the engine. Each fuel injector operates like a solenoid valve, opening and closing rapidly to allow a precise amount of fuel to be injected into the engine for combustion. When you hear the clicking sound, it confirms that the injectors are receiving the appropriate electrical signals and are actively delivering fuel.

Other methods, such as inspecting fuel lines for leaks, monitoring oil pressure, or checking the exhaust smell may provide some information about the overall fuel system or engine condition, but they do not directly assess the operational status of the fuel injectors themselves. Thus, listening for that characteristic clicking sound is a reliable and direct way to confirm that the fuel injectors are working correctly.