Page 1929 of 2870

EN(H4DOTC)-296
ENGINE (DIAGNOSTIC)
General Diagnostic Table
*1: Check ignition coil & ignitor ASSY and spark plug.
*2: Indicate the symptom occurring only in cold temperatures.
*3: Ensure the secure installation.
*4: Check fuel injector, fuel pressure regulator and fuel filter.
*5: Inspect air leak in air intake system.
*6: Adjust accelerator cable. 6. Surging1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Engine coolant temperature sensor (*2)
4) Crankshaft position sensor (*3)
5) Camshaft position sensor (*3)
6) Fuel injection parts (*4)
7) Throttle position sensor
8) Fuel pump and fuel pump relay
7. Spark knock1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Engine coolant temperature sensor
4) Knock sensor
5) Fuel injection parts (*4)
6) Fuel pump and fuel pump relay
8. After burning in exhaust system1) Manifold absolute pressure sensor
2) Mass air flow and intake air temperature sensor
3) Engine coolant temperature sensor (*2)
4) Fuel injection parts (*4)
5) Fuel pump and fuel pump relay Symptom Problem parts
Page 1930 of 2870

FUJI HEAVY INDUSTRIES LTD. G8080GE4
2004 FORESTER SERVICE MANUAL QUICK REFERENCE INDEX
ENGINE SECTION 3
This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance of experienced mechanics.
Please peruse and utilize this manual
fully to ensure complete repair work for
satisfying our customers by keeping
their vehicle in optimum condition.
When replacement of parts during
repair work is needed, be sure to use
SUBARU genuine parts.
All information, illustration and specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.FUEL INJECTION (FUEL SYSTEM) FU(H4DOTC 2.5)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICE)EC(H4DOTC 2.5)
INTAKE (INDUCTION) IN(H4DOTC 2.5)
MECHANICAL ME(H4DOTC 2.5)
EXHAUST EX(H4DOTC 2.5)
COOLING CO(H4DOTC 2.5)
LUBRICATION LU(H4DOTC 2.5)
SPEED CONTROL SYSTEM SP(H4DOTC 2.5)
IGNITION IG(H4DOTC 2.5)
STARTING/CHARGING SYSTEM SC(H4DOTC 2.5)
ENGINE (DIAGNOSTIC) EN(H4DOTC 2.5)
Page 1931 of 2870

FUEL INJECTION (FUEL SYSTEM)
FU(H4DOTC 2.5)
Page
1. General Description ....................................................................................2
2. Throttle Body .............................................................................................13
3. Intake Manifold ..........................................................................................14
4. Engine Coolant Temperature Sensor........................................................26
5. Crankshaft Position Sensor.......................................................................27
6. Camshaft Position Sensor.........................................................................28
7. Knock Sensor ............................................................................................29
8. Mass Air Flow and Intake Air Temperature Sensor ..................................30
9. Manifold Absolute Pressure Sensor ..........................................................31
10. Fuel Injector ..............................................................................................32
11. Tumble Generator Valve Assembly ..........................................................33
12. Tumble Generator Valve Actuator.............................................................34
13. Wastegate Control Solenoid Valve ...........................................................35
14. Front Oxygen (A/F) Sensor .......................................................................36
15. Rear Oxygen Sensor.................................................................................38
16. Exhaust Temperature Sensor ...................................................................40
17. Engine Control Module (ECM) ..................................................................41
18. Main Relay ................................................................................................42
19. Fuel Pump Relay.......................................................................................43
20. Fuel Pump Control Unit .............................................................................44
21. Fuel ...........................................................................................................45
22. Fuel Tank ..................................................................................................46
23. Fuel Filler Pipe ..........................................................................................48
24. Fuel Pump .................................................................................................52
25. Fuel Level Sensor .....................................................................................54
26. Fuel Sub Level Sensor ..............................................................................55
27. Fuel Filter ..................................................................................................57
28. Fuel Cut Valve...........................................................................................58
29. Fuel Damper Valve ...................................................................................59
30. Fuel Delivery, Return and Evaporation Lines............................................60
31. Fuel System Trouble in General ...............................................................63
Page 1932 of 2870
FU(H4DOTC 2.5)-2
FUEL INJECTION (FUEL SYSTEM)
General Description
1. General Description
A: SPECIFICATION
Fuel tankCapacity 602 (15.9 US gal, 13.2 Imp gal)
Location Under rear seat
Fuel pumpType Impeller
Shutoff discharge pressure
450 — 677 kPa (4.59 — 6.9 kg/cm
2, 65.27 — 98.2 psi)
Discharge flowMore than 1302 (34.3 US gal, 28.6 Imp gal)/h
[12 V at 300 kPa (3.06 kg/cm
2, 43.5 psi)]
Fuel filterCartridge type
Page 1933 of 2870
FU(H4DOTC 2.5)-3
FUEL INJECTION (FUEL SYSTEM)
General Description
B: COMPONENT
1. INTAKE MANIFOLD
FU-02105
(14)
T4
T4
T4
T1 (22) (22)
(21)
(6)
(2)
(3)
T5
(1)
(5)
(3) (2)(4)
(11)
(12) (13)
(20)
T1
T1
T3
T2
T4
T4
T4
T2
T5
T4
T4
(8)
(7)
(17)
(19)(16)
(18)
(7)
(10)
(10)
(11)
(13)
(8)
(9)
(23)(23)
T2
(9)
(12)
T4
(15)
T4
Page 1934 of 2870
FU(H4DOTC 2.5)-4
FUEL INJECTION (FUEL SYSTEM)
General Description
(1) Fuel pipe ASSY (12) O-ring (22) Purge hose
(2) Fuel hose (13) Fuel injector pipe (23) Tumble generator valve actuator
(3) Clamp (14) Pressure regulator
(4) Purge control solenoid valve (15) Pressure regulator hoseTightening torque: N·m (kgf-m, ft-lb)
(5) Vacuum hose (16) Fuel pipe protector RHT1: 5 (0.5, 3.7)
(6) Vacuum control hose (17) Blow-by hose stayT2: 8.25 (0.84, 6.1)
(7) Intake manifold gasket (18) Intake manifoldT3: 17 (1.73, 12.5)
(8) Guide pin (19) Wastegate control solenoid valve
ASSYT4: 19 (1.94, 13.7)
(9) Tumble generator valve ASSYT5: 25 (2.5, 18.1)
(10) Tumble generator valve gasket (20) Nipple
(11) Fuel injector (21) Purge valve
Page 1935 of 2870
FU(H4DOTC 2.5)-5
FUEL INJECTION (FUEL SYSTEM)
General Description
2. AIR INTAKE SYSTEM
(1) Gasket (3) Manifold absolute pressure sensorTightening torque: N·m (kgf-m, ft-lb)
(2) Throttle body (4) O-ringT1: 1.6 (0.16, 1.2)
T2: 8 (0.8, 5.8)
FU-01072
T1T2
(1)(3)
(2)
(4)
Page 1936 of 2870
FU(H4DOTC 2.5)-6
FUEL INJECTION (FUEL SYSTEM)
General Description
3. CRANKSHAFT POSITION, CAMSHAFT POSITION AND KNOCK SENSORS
(1) Crankshaft position sensor (3) Camshaft position sensor LHTightening torque: N·m (kgf-m, ft-lb)
(2) Knock sensor (4) Camshaft position sensor RHT1: 6.4 (0.65, 4.7)
T2: 24 (2.4, 17.4)
FU-01036
T1
(4)
T1
T2
T1
(3)
(2) (1)