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 MANUALSSUBARU2007OUTBACK LIMITED, 4D SEDAN, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEMSFUEL INJECTION SYSTEM (H4SO)FUEL SYSTEM TROUBLE IN GENERALINSPECTION
2007 Subaru Outback Limited, 4D Sedan, Standard
Fuel System Trouble in General: Inspection
2007 Subaru Outback Limited, 4D Sedan, StandardSECTION Inspection
FUEL SYSTEM - TROUBLESHOOTING CHART
| Trouble and possible cause | Corrective action | ||
|---|---|---|---|
| 1. Insufficient fuel supply to injector | |||
| 1) | Fuel pump does not operate. | ||
| ◦ | Defective terminal contact | Inspect contact, especially ground, and tighten it securely. | |
| ◦ | Trouble in electromagnetic or electronic circuit parts | Replace the faulty parts. | |
| 2) | Decline of fuel pump function | Replace the fuel pump. | |
| 3) | Clogged fuel filter | Replace the fuel filter. | |
| 4) | Clogged or bent fuel pipe or hose | Clean, correct or replace the fuel pipe or hose. | |
| 5) | Air is mixed in the fuel system. | Inspect or retighten each connection part. | |
| 6) | Clogged or bent air breather tube or pipe. | Clean, correct or replace the air breather tube or pipe. | |
| 7) | Damaged diaphragm of pressure regulator | Replace. | |
| 2. Leakage or blow out of fuel | |||
| 1) | Loose joints of the fuel pipe | Retighten. | |
| 2) | Cracked fuel pipe, hose and fuel tank | Replace. | |
| 3) | Defective welding part on the fuel tank | Replace. | |
| 4) | Defective drain gasket of the fuel tank | Replace. | |
| 5) | Clogged or bent air breather tube or air vent tube | Clean, correct or replace the air breather tube or air vent tube. | |
| 3. Gasoline smell inside of compartment | |||
| 1) | Loose joints at air breather tube, air vent tube and fuel filler pipe | Retighten. | |
| 2) | Fuel saucer gasket air tightness fault | Correct or replace the gasket. | |
| 3) | Inoperative fuel pump modulator or circuit | Replace. | |
| 4. Defective fuel meter indicator | |||
| 1) | Defective operation of fuel level sensor | Replace. | |
| 2) | Defective operation of fuel meter | Replace. | |
| 5. Noise | |||
| 1) | Large operation noise or vibration of fuel pump | Replace. | |
NOTE:
- When the vehicle is left unattended for an extended period of time, water may accumulate in the fuel tank. Fill the fuel tank fully to prevent this.
- In snow-covered areas, mountainous areas, skiing areas, etc. where ambient temperatures drop below 0°C (32°F) throughout the winter season, use a water removing agent in the fuel system to prevent freezing fuel system and accumulating water.
- When water is accumulated in fuel filter, fill the water removing agent in the fuel tank.
- Before using water removing agent, follow the cautions noted on the bottle.
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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.