Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Fuel Injectors
| Callout | Component Name |
|---|---|
| 1 | Fuel Inlet Filter |
| 2 | Solenoid Coil Windings |
| 3 | Armature |
| 4 | Seat Ball Valve |
| 5 | Electrical Terminals |
The fuel injector is an electromagnetic (solenoid) type injection nozzle that injects fuel into the intake port of the cylinder head. There are six fuel injectors, one for each cylinder, located between the intake manifold and the fuel rail.
The powertrain control module energizes the solenoid coil (2) of the fuel injector, generating an electromagnet field that attracts the solenoid plunger (3). The ball valve (4), which is incorporated with the solenoid plunger, is opened by the movement of the solenoid plunger. The opening of the ball valve allows fuel that is under pressure to disperse in a cone shaped (conic) pattern. Because the stroke of the ball valve in the fuel injector is set constant, the amount of fuel injected at one time is determined by the length of time the solenoid coil is energized, or pulse width injection time.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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