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.
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HOMESERVICE MANUALSSUBARU2007IMPREZA BASE, 4D WAGON, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSFUEL INJECTION SYSTEM (H4SO)
2007 Subaru Impreza Base, 4D Wagon, Automatic
Fuel Injection System (H4SO)
2007 Subaru Impreza Base, 4D Wagon, AutomaticSECTION Fuel Injection System (H4SO)
- General Description
- Throttle Body
- Intake Manifold
- Engine Coolant Temperature Sensor
- Crankshaft Position Sensor
- Camshaft Position Sensor
- Knock Sensor
- Throttle Position Sensor
- Manifold Absolute Pressure Sensor
- Mass Air Flow and Intake Air Temperature Sensor
- EGR Valve
- Fuel Injector
- Variable Valve Lift Diagnosis Oil Pressure Switch
- Oil Temperature Sensor
- Front Oxygen (A/F) Sensor
- Rear Oxygen Sensor
- Engine Control Module (ECM)
- Main Relay
- Fuel Pump Relay
- Electronic Throttle Control Relay
- Fuel
- Fuel Tank
- Fuel Filler Pipe
- Fuel Pump
- Fuel Level Sensor
- Fuel Sub Level Sensor
- Fuel Filter
- Fuel Cut Valve
- Fuel Damper Valve
- Fuel Delivery and Evaporation Lines
- Fuel System Trouble in General
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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.