Subaru Legacy IV (2008 year). Manual - part 44

FU(H4SO)-65

Fuel Delivery and Evaporation Lines

FUEL INJECTION (FUEL SYSTEMS)

29.Fuel Delivery and Evaporation Lines

A: REMOVAL

WARNING:
Place “NO OPEN FLAMES” signs near the
working area.

CAUTION:
Be careful not to spill fuel.
1) Set the vehicle on a lift.
2) Release the fuel pressure. <Ref. to FU(H4SO)-
43, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
3) Open the fuel filler lid, and remove the fuel filler
cap.
4) Remove the floor mat. <Ref. to EI-72, REMOV-
AL, Floor Mat.>
5) In the engine compartment, disconnect the fuel
delivery hoses and evaporation hose.

(1) Disconnect the quick connector of the fuel
delivery line by pushing the ST in the direction
of the arrow.

42099FE000

QUICK CONNECTOR
RELEASE

(2) Remove the clip and disconnect the evapo-
ration hose from the pipe.

CAUTION:
• Be careful not to spill fuel.
• Catch the fuel from hoses using a container
or cloth.

FU-02831

(A) Fuel delivery hose

(B) Evaporation hose

FU-03435

(A)

(B)

FU(H4SO)-66

Fuel Delivery and Evaporation Lines

FUEL INJECTION (FUEL SYSTEMS)

6) Remove the canister. <Ref. to EC(H4SO)-5, RE-
MOVAL, Canister.>
7) Remove the fuel tank. <Ref. to FU(H4SO)-45,
REMOVAL, Fuel Tank.>
8) Remove the fuel pipe assembly.
9) Disconnect the quick connector, and disconnect
the fuel delivery tube and jet pump tube.

(1) Clean the pipe and connector, if they are
covered with dust.
(2) To prevent from damaging or entering for-
eign matter, wrap the pipes and connectors with
plastic bag etc.

(3) Hold the connector (A) and push the retainer
(B) down.
(4) Pull out the connector (A) from the retainer
(B).

B: INSTALLATION

Install in the reverse order of removal while being
careful of the following.

1. CONNECTING THE FUEL LINE QUICK
CONNECTOR

CAUTION:
Make sure there is no damage or dust on the
connections. If necessary, clean seal surface of
pipe.

NOTE:
Use a new retainer.

1) Set the new retainer (B) to connector (A).
2) Push the pipe into the connector completely.

(A) Connector

(B) Retainer

FU-01333

FU-00124

( A )

( B )

( C )

(A) Seal surface

(B) Pipe

(A) Connector

(B) Retainer

( A )

( B )

FU-00125

FU-00126

( A )

( B )

( C )

FU(H4SO)-67

Fuel Delivery and Evaporation Lines

FUEL INJECTION (FUEL SYSTEMS)

CAUTION:
• Pull the connector to ensure it is connected
securely.
• Make sure the two retainer pawls are en-
gaged in their mating positions in the connec-
tor.
• Be sure to inspect hoses and their connec-
tions for any leakage of fuel.

2. CONNECTING THE FUEL DELIVERY
HOSE.

Connect the fuel delivery hose to the pipe with an
overlap of 20 to 25 mm (0.79 to 0.98 in).
Type A: When the amount to be inserted is speci-
fied.
Type B: When the amount to be inserted is not
specified.

L1: 2.5

1.5 mm (0.098

0.059 in)

L2: 22.5

2.5 mm (0.886

0.098 in)

CAUTION:
Be sure to inspect hoses and their connections
for any leakage of fuel.

3. CONNECTING THE EVAPORATION HOSE

Connect the evaporation hose to the pipe with an
overlap of 15 to 20 mm (0.59 to 0.79 in).

L = 17.5

2.5 mm (0.689

0.098 in)

C: INSPECTION

1) Make sure that there are no cracks on the fuel
pipes and fuel hoses.
2) Make sure the fuel pipe and fuel hose connec-
tions are tightened firmly.

(A) Connector

(B) Retainer

(1) Type A

(2) Type B

(3) Pipe

(4) Clamp

(5) Hose

FU-00127

( A )

( B )

( C )

FU-03390

(3)

(4)

(5)

(1)

(2)

(1) Hose

(2) Clip

(3) Pipe

FU-00129

(1)

(2)

L/2

(3)

FU(H4SO)-68

Fuel System Trouble in General

FUEL INJECTION (FUEL SYSTEMS)

30.Fuel System Trouble in General

A: INSPECTION

NOTE:
• When the vehicle is left unattended for an extended period of time, water may accumulate in the fuel tank.
Fill fuel fully to prevent the problem.
• In snow-covered areas, mountainous areas, skiing areas, etc. where ambient temperatures drop to 0°C
(32°F) or less throughout the winter season, use a water removing agent in the fuel system to prevent freez-
ing 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.

Trouble and possible cause

Corrective action

1. Insufficient fuel supply to injector

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.

Decline of fuel pump function

Replace the fuel pump.

Clogged fuel filter

Replace the fuel filter. Clean or replace the fuel tank if
necessary.

Clogged or bent fuel pipe or hose

Clean, correct or replace the fuel pipe or hose.

Air is mixed in the fuel system.

Inspect or retighten each connection part.

Clogged or bent air breather tube or pipe.

Clean, correct or replace the air breather tube or pipe.

Damaged diaphragm of pressure regulator

Replace.

2. Leakage or blow out of fuel

Loose joints of the fuel pipe

Retighten.

Cracked fuel pipe, hose and fuel tank

Replace.

Defective welding part on the fuel tank

Replace.

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

Loose joints at air breather tube, air vent tube and fuel filler
pipe

Retighten.

Fuel saucer gasket air tightness fault

Correct or replace the gasket.

Inoperative fuel pump modulator or circuit

Replace.

4. Defective fuel meter indicator

Defective operation of fuel level sensor

Replace.

Defective operation of fuel meter

Replace.

5. Noise

Large operation noise or vibration of fuel pump

Replace.

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