The solenoid is a small, electric device that opens and closes the fuel injectors on your car’s engine. It’s responsible for delivering the precise amount of fuel needed for combustion and needs to be replaced every few years as part of routine maintenance.
How It Works
The solenoid is made of an electromagnet with an armature that moves up and down. When the electromagnet’s current is on, it pulls the armature up; when off, it lets the armature relax downward. A hose delivers high-pressure fuel to the injector at all times, even when the solenoid is turned off. An adjustable spring keeps the armature down, even with no current running through the electromagnet. A screen in front of the armature prevents large particles from interfering with its movement and small particles pass through a fine wire mesh to keep them out of other parts in your car’s fuel injection system.
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