How to Correctly Determine Fuel Injector Malfunctions?

[OKeegan]

Methods to correctly determine fuel injector malfunctions: 1. Use a multimeter to measure the resistance of the injector solenoid coil; 2. During testing, unplug the two-terminal wiring harness connector on each injector and measure the standard resistance value between the two terminals on the injector socket; 3. If the resistance is infinite, it indicates an open circuit in the solenoid coil, and the injector should be replaced. The fuel injector itself is a normally closed valve. When there is no input control signal, the valve remains closed, whereas a normally open valve remains open without an input control signal. The opening and closing of the valve are controlled by the up-and-down movement of a valve needle. The working principle of the fuel injector is that when the solenoid coil is energized, it generates a magnetic force that lifts the needle valve, opening the injection hole. Fuel is sprayed at high speed through the annular gap between the needle valve head and the injection hole, forming a fine mist that facilitates complete combustion.