Subaru Legacy (2005 year). Manual - part 174
FU(H4SO 2.5)-59
FUEL INJECTION (FUEL SYSTEMS)
Fuel System Trouble in General
32.Fuel System Trouble in General
A: INSPECTION
NOTE:
• When the vehicle is left unused for an extended period of time, water may accumulate in the fuel tank. Fill
fuel fully to prevent those problem. And also drain the water condensation from fuel filter.
• In snow-covered areas, mountainous areas, skiing areas, etc. where ambient temperatures drop below
0
°C (32°F) throughout the winter season, use water removing agent in the fuel system to prevent freezing
fuel system and accumulating water. Fill the water removing agent each time the fuel is reduced to half to
maintain the advantage.
• When water condensation is noticed in the fuel filter, drain the water from both the fuel filter and fuel tank
or use water removing agent in the fuel tank.
• Before using water removing agent, follow the cautions noted on the bottle.
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 dust or water in the fuel filter
Replace fuel filter, clean or replace fuel tank.
4)
Clogged or bent fuel pipe or hose
Clean, correct or replace the fuel pipe or hose.
5)
Air mixed in the fuel system
Inspect or retighten each connection part.
6)
Clogged or bent air breather tube or pipe
Clean, correct or replace air breather tube or pipe.
7)
Damaged diaphragm of pressure regulator
Replace.
2. Leakage or blow out of fuel
1)
Loosened 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 packing of the fuel tank
Replace.
5)
Clogged or bent air breather tube or air vent tube
Clean, correct or replace 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)
Defective packing air tightness on the fuel saucer
Correct or replace the packing.
3)
Defective 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.