2004 SUBARU FORESTER sensor

FU(H4SO)-59
FUEL INJECTION (FUEL SYSTEM)
Fuel Sub Level Sensor
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
4.4 N
⋅m (0.45 kgf-m, 3.3 ft-lb)
FU-00115

FU(H4SO)-66
FUEL INJECTION (FUEL SYSTEM)
Fuel System Trouble in General
29.Fuel System Trouble in General
A: INSPECTION
NOTE:
 When the vehicle is left unattended for an ex-
tended period of time, water may accumulate in the
fuel tank.
To prevent water condensation.
(1) Top off the fuel tank or drain the fuel com-
pletely.
(2) Drain the water condensation from the fuel
filter.
 Refilling the fuel tank.
Refill the fuel tank while there is still some fuel left in
the tank.
 Protecting the fuel system against freezing and
water condensation.
(3) Cold areas :
In snow-covered areas, mountainous areas, ski-
ing areas, etc. where ambient temperatures
drop below 0°C (32°F) throughout the winter
season, use an anti-freeze solution in the fuel
tank. Refueling will also complement the effect
of anti-freeze solution each time the fuel leveldrops to about one-half. After the winter season,
drain the water which may have accumulated in
the fuel filter and fuel tank in the manner same
as that described under “Affected areas” below.
(4) Affected areas :
When the water condensation is notched in the
fuel filter, drain the water from both the fuel filter
and fuel tank or use a water removing agent (or
anti-freeze solution) in the fuel tank.
 Observe the instructions, notes, etc., indicated
on the label affixed to the anti-freeze solution (wa-
ter removing agent) container before use.
Trouble and possible cause Corrective action
1. Insufficient fuel supply to the injector
1) Fuel pump will not operate.
❍Defective terminal contact.Inspect connections, especially ground, and tighten
securely.
❍Trouble in electromagnetic or electronic circuit parts. Replace fuel pump.
2) Lowering of fuel pump function. Replace 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 fuel pipe or hose.
5) Air is mixed in the fuel system. Inspect or retighten each connection part.
6) Clogged or bent 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 fuel
1) Loosened joints of the fuel pipe. Retightening.
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.Retightening.
2) Defective packing air tightness on the fuel saucer. Correct or replace packing.
3) Cracked fuel separator. Replace separator.
4) 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.

EC(H4SO)-2
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICE)
General Description
1. General Description
A: CAUTION
 Wear working clothing, including a cap, protec-
tive goggles, and protective shoes during opera-
tion.
 Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
 Keep the disassembled parts in order and pro-
tect them from dust or dirt.
 Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly, and replacement.
 Be careful not to burn yourself, because each
part on the vehicle is hot after running.
 Be sure to tighten fasteners including bolts and
nuts to the specified torque.
 Place shop jacks or rigid racks at the specified
points.
 Before disconnecting electrical connectors of
sensors or units, be sure to disconnect the ground
cable from battery.

EC(H4SO)-3
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICE)
Front Catalytic Converter
2. Front Catalytic Converter
A: REMOVAL
1) Set the vehicle on a lift.
2) Disconnect the ground cable from battery.
3) Disconnect the front oxygen (A/F) sensor con-
nector.
4) Disconnect the connector from rear oxygen sen-
sor connector.
5) Lift-up the vehicle.
6) Remove the under cover.7) Separate the center exhaust pipe from rear ex-
haust pipe.
CAUTION:
Be careful, the exhaust pipe is hot.
8) Remove the nuts which hold front exhaust pipe
onto cylinder heads.
9) Remove the front and center exhaust pipe from
hanger bracket.
CAUTION:
Be careful not to pull down the front exhaust
pipe and center exhaust pipe.
FU-00009
EX-00029
EX-00030
EX-00037
EC-00009
EX-00038

EC(H4SO)-5
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICE)
Front Catalytic Converter
7) Lower the vehicle.
8) Connect the front oxygen (A/F) sensor connec-
tor.
9) Connect the connector to rear oxygen sensor
connector.
10) Connect the battery ground cable to battery.
C: INSPECTION
1) Make sure there are no exhaust leaks from con-
nections and welds.
2) Make sure there are no holes or rusting.
EX-00029
EX-00030
FU-00009

IN(H4SO)-3
INTAKE (INDUCTION)
General Description
(1) Spacer (10) Clip (19) Spacer
(2) Bushing (11) Air cleaner element (20) Clip
(3) Resonator chamber (12) Air cleaner case B
(4) Cushion (13) Stay LH (MT model)Tightening torque: N
⋅m (kgf-m, ft-lb)
(5) Air intake duct A (14) Stay LH (AT model)T1: 33 (3.4, 24.6)
(6) Air intake duct B (15) Stay RHT2: 6.5 (0.66, 4.8)
(7) Bushing (16) Engine harness bracketT3: 7.5 (0.76, 5.5)
(8) Intake air temperature sensor (17) ClampT4: 16 (1.6, 11.6)
(9) Air cleaner case A (18) BushingT5: 3 (0.3, 2.2)

IN(H4SO)-4
INTAKE (INDUCTION)
General Description
B: CAUTION
 Wear working clothing, including a cap, protec-
tive goggles, and protective shoes during opera-
tion.
 Remove contamination including dirt and corro-
sion before removal, installation or disassembly.
 Keep the disassembled parts in order and pro-
tect them from dust or dirt.
 Before removal, installation or disassembly, be
sure to clarify the failure. Avoid unnecessary re-
moval, installation, disassembly, and replacement.
 Be careful not to burn your hands, because each
part on the vehicle is hot after running.
 Be sure to tighten fasteners including bolts and
nuts to the specified torque.
 Place shop jacks or rigid racks at the specified
points.
 Before disconnecting electrical connectors of
sensor or units, be sure to disconnect the ground
cable from battery.

IN(H4SO)-6
INTAKE (INDUCTION)
Air Cleaner Case
3. Air Cleaner Case
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Disconnect the connector (A) of intake air tem-
perature sensor.
3) Remove the bolt (B) which installs air cleaner
case to stay.
4) Disconnect the hoses and intake duct from air
cleaner case.
5) Loosen the clamp which connects air cleaner
case to throttle body.
6) Remove the air cleaner case.
B: INSTALLATION
Install in the reverse order of removal.
NOTE:
Refer to “COMPONENT” for tightening torque.
scription.>
C: INSPECTION
Inspect for cracks and loose connections.
FU-00009
IN-00040
(B)
(A)(B)
IN-00041