1997 SUBARU LEGACY fuel pump

B2M0049
11) On AWD model, after removing fuel sub meter unit,
drain fuel from there.
WARNING:
Do not use a motor pump when draining fuel.
2. On-Car Services
A: MEASUREMENT OF FUEL PRESSURE
1) Release fuel pressure.
2) Connect connector to fuel pump.
G2M0347
3) Disconnect fuel delivery hoses from fuel filter, and con-
nect fuel pressure gauge.
G2M0348
4) Start the engine.
5) Measure fuel pressure while disconnecting pressure
regulator vacuum hose from collector chamber.
Fuel pressure:
235 — 265 kPa (2.4 — 2.7 kg/cm
2, 34 — 38 psi)
6) After connecting pressure regulator vacuum hose, mea-
sure fuel pressure.
Fuel pressure:
177 — 206 kPa (1.8 — 2.1 kg/cm
2, 26 — 30 psi)
WARNING:
Before removing fuel pressure gauge, release fuel
pressure.
NOTE:
If out of specification as measured at step 6), check or
replace pressure regulator and pressure regulator vacuum
hose.
12
2-8SERVICE PROCEDURE
1. Precautions - 2. On-Car Services

B2M0049
11) On AWD model, after removing fuel sub meter unit,
drain fuel from there.
WARNING:
Do not use a motor pump when draining fuel.
2. On-Car Services
A: MEASUREMENT OF FUEL PRESSURE
1) Release fuel pressure.
2) Connect connector to fuel pump.
G2M0347
3) Disconnect fuel delivery hoses from fuel filter, and con-
nect fuel pressure gauge.
G2M0348
4) Start the engine.
5) Measure fuel pressure while disconnecting pressure
regulator vacuum hose from collector chamber.
Fuel pressure:
235 — 265 kPa (2.4 — 2.7 kg/cm
2, 34 — 38 psi)
6) After connecting pressure regulator vacuum hose, mea-
sure fuel pressure.
Fuel pressure:
177 — 206 kPa (1.8 — 2.1 kg/cm
2, 26 — 30 psi)
WARNING:
Before removing fuel pressure gauge, release fuel
pressure.
NOTE:
If out of specification as measured at step 6), check or
replace pressure regulator and pressure regulator vacuum
hose.
12
2-8SERVICE PROCEDURE
1. Precautions - 2. On-Car Services

G3M0059
6) Install rear differential assembly.
G2M0384
7) Install muffler assembly.
G2M0382
8) Install heat sealed cover.
9) Install rear exhaust pipe.
G2M0340
10) Lower the vehicle, and connect connector to fuel
pump.
11) Install access hole lid.
G2M0345
4. Fuel Filler Pipe
A: REMOVAL
1) Release fuel pressure.
2) Drain fuel from fuel tank.
16
2-8SERVICE PROCEDURE
3. Fuel Tank - 4. Fuel Filler Pipe

G3M0059
6) Install rear differential assembly.
G2M0384
7) Install muffler assembly.
G2M0382
8) Install heat sealed cover.
9) Install rear exhaust pipe.
G2M0340
10) Lower the vehicle, and connect connector to fuel
pump.
11) Install access hole lid.
G2M0345
4. Fuel Filler Pipe
A: REMOVAL
1) Release fuel pressure.
2) Drain fuel from fuel tank.
16
2-8SERVICE PROCEDURE
3. Fuel Tank - 4. Fuel Filler Pipe

C: INSTALLATION
CAUTION:
If fuel hoses are damaged at the connecting portion,
replace it with a new one.
If clamps are badly damaged, replace with new ones.
G2M0347
1) Installation is in the reverse order of removal.
2) Tighten hose clamp screws.
Tightening torque:
1.0
+0.5
0N⋅m (0.1+0.05
0kg-m, 0.7+0.4
0ft-lb)
B2M0048A
6. Fuel Pump
A: REMOVAL
1) Release fuel pressure.
2) Disconnect fuel delivery hose

1and return hose
2.
3) Disconnect jet pump hose

3. (AWD model)
G2M0343
4) Remove nuts which install fuel pump assembly onto
fuel tank.
G2M0344
5) Take off fuel pump from fuel tank.
19
2-8SERVICE PROCEDURE
5. Fuel Filter - 6. Fuel Pump

C: INSTALLATION
CAUTION:
If fuel hoses are damaged at the connecting portion,
replace it with a new one.
If clamps are badly damaged, replace with new ones.
G2M0347
1) Installation is in the reverse order of removal.
2) Tighten hose clamp screws.
Tightening torque:
1.0
+0.5
0N⋅m (0.1+0.05
0kg-m, 0.7+0.4
0ft-lb)
B2M0048A
6. Fuel Pump
A: REMOVAL
1) Release fuel pressure.
2) Disconnect fuel delivery hose

1and return hose
2.
3) Disconnect jet pump hose

3. (AWD model)
G2M0343
4) Remove nuts which install fuel pump assembly onto
fuel tank.
G2M0344
5) Take off fuel pump from fuel tank.
19
2-8SERVICE PROCEDURE
5. Fuel Filter - 6. Fuel Pump

G2M0366
B: INSPECTION
Connect lead harness to connector terminal of fuel pump,
and apply battery power supply to check whether the pump
operate.
WARNING:
Wipe off the fuel completely.
Keep battery as far apart from fuel pump as pos-
sible.
Be sure to turn the battery supply ON and OFF on
the battery side.
Do not run fuel pump for a long time under non-load
condition.
G2M0346
C: INSTALLATION
Installation is in the reverse order of removal. Do the fol-
lowing:
(1) Always use new gaskets.
(2) Ensure sealing portion is free from fuel or foreign
particles before installation.
(3) Tighten nuts in numerical sequence shown in Fig-
ure to specified torque.
Tightening torque:
4.4±1.5 N⋅m (0.45±0.15 kg-m, 3.3±1.1 ft-lb)
B2M0048A
7. Fuel Meter Unit
A: REMOVAL
NOTE:
Fuel meter unit is built in fuel pump assembly.
1) Release fuel pressure.
2) Disconnect fuel delivery hose

1and return hose
2.
3) Disconnect jet pump hose

3. (AWD model)
20
2-8SERVICE PROCEDURE
6. Fuel Pump - 7. Fuel Meter Unit

G2M0366
B: INSPECTION
Connect lead harness to connector terminal of fuel pump,
and apply battery power supply to check whether the pump
operate.
WARNING:
Wipe off the fuel completely.
Keep battery as far apart from fuel pump as pos-
sible.
Be sure to turn the battery supply ON and OFF on
the battery side.
Do not run fuel pump for a long time under non-load
condition.
G2M0346
C: INSTALLATION
Installation is in the reverse order of removal. Do the fol-
lowing:
(1) Always use new gaskets.
(2) Ensure sealing portion is free from fuel or foreign
particles before installation.
(3) Tighten nuts in numerical sequence shown in Fig-
ure to specified torque.
Tightening torque:
4.4±1.5 N⋅m (0.45±0.15 kg-m, 3.3±1.1 ft-lb)
B2M0048A
7. Fuel Meter Unit
A: REMOVAL
NOTE:
Fuel meter unit is built in fuel pump assembly.
1) Release fuel pressure.
2) Disconnect fuel delivery hose

1and return hose
2.
3) Disconnect jet pump hose

3. (AWD model)
20
2-8SERVICE PROCEDURE
6. Fuel Pump - 7. Fuel Meter Unit