1999 SUBARU LEGACY air filter

9) Installation is in the reverse order of removal.
Tightening torque:
24.5
±5 N´m (2.5±0.5 kg-m, 18.1±3.6 ft-lb)
B2M1781
11. Vent Control Solenoid Valve
(2500 cc Model)
A: REMOVAL
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Remove canister.
B2M1780
4) Disconnect two hoses from air filter.
B2M1888A
15
[W11A0]2-1SERVICE PROCEDURE
11. Vent Control Solenoid Valve (2500 cc Model)

9) Installation is in the reverse order of removal.
Tightening torque:
24.5
±5 N´m (2.5±0.5 kg-m, 18.1±3.6 ft-lb)
B2M1781
11. Vent Control Solenoid Valve
(2500 cc Model)
A: REMOVAL
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Remove canister.
B2M1780
4) Disconnect two hoses from air filter.
B2M1888A
15
[W11A0]2-1SERVICE PROCEDURE
11. Vent Control Solenoid Valve (2500 cc Model)

4) Connect connector to vent control solenoid
valve.
B2M0964
5) Connect two hoses to air filter.
B2M1888A
6) Install canister.
B2M1780
7) Lower the vehicle.
8) Connect battery ground cable.
B2M1723
12. Main Fuel Level Sensor
A: REMOVAL
1) Release fuel pressure.
2) Open fuel flap lid, and remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Disconnect fuel delivery hose (A), return hose
(B) and jet pump hose (C).
B2M0954E
17
[W12A0]2-1SERVICE PROCEDURE
12. Main Fuel Level Sensor

4) Connect connector to vent control solenoid
valve.
B2M0964
5) Connect two hoses to air filter.
B2M1888A
6) Install canister.
B2M1780
7) Lower the vehicle.
8) Connect battery ground cable.
B2M1723
12. Main Fuel Level Sensor
A: REMOVAL
1) Release fuel pressure.
2) Open fuel flap lid, and remove fuel filler cap.
B2M1746
3) Disconnect battery ground cable.
B2M1723
4) Disconnect fuel delivery hose (A), return hose
(B) and jet pump hose (C).
B2M0954E
17
[W12A0]2-1SERVICE PROCEDURE
12. Main Fuel Level Sensor

13. Air Filter
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Remove canister.
B2M1780
4) Disconnect connector from drain valve.
B2M1788
5) Disconnect evaporation hoses from joint pipes.
B2M1789
6) Remove nut which installs air filter and drain
valve brackets on body, and remove them as a
unit.
B2M1790
7) Disconnect evaporation hoses, and remove air
filter.
B2M1791A
8) Installation is in the reverse order of removal.
Tightening torque:
22.5
±7 N´m (2.3±0.7 kg-m, 16.6±5.1 ft-lb)
B2M1790
19
[W13A0]2-1SERVICE PROCEDURE
13. Air Filter

6) Remove bolt which installs air filter and drain
valve brackets on body.
B2M1790
7) Move air filter to upper side, and remove drain
valve with bracket.
B2M1799
8) Installation is in the reverse order of removal.
Tightening torque:
22.5
±7 N´m (2.3±0.7 kg-m, 16.6±5.1 ft-lb)
B2M1790
24
2-1[W17A0]SERVICE PROCEDURE
17. Drain Valve

TROUBLE PROBLEM PARTS, ETC. POSSIBLE CAUSE RANK
4) Engine stalls after initial
combustion.Fuel injection system A
IIntake systemILoosened or cracked intake uct B
ILoosened or cracked PCV hose C
ILoosened or cracked vacuum hose C
IDefective intake manifold gasket B
IDefective throttle body gasket B
IDirty air cleaner element C
IFuel lineIClogged fuel line C
ILack of or insufficient fuel B
IBeltIDefective B
IDefective timing B
ICompressionIIncorrect valve clearance C
ILoosened spark plugs or defective gasket C
ILoosened cylinder head bolts or defective gasket C
IImproper valve seating C
IDefective valve stem C
IWorn or broken valve spring B
IWorn or stuck piston rings, cylinder and piston C
IIncorrect valve timing B
IImproper engine oil (low viscosity) B
2. Rough idle and engine stall Fuel injection system A
IIntake systemILoosened or cracked intake duct A
ILoosened or cracked PCV hose A
ILoosened or cracked vacuum hose A
IDefective intake manifold gasket B
IDefective throttle body gasket B
IDefective PCV valve C
ILoosened oil filter cap B
IDirty air cleaner element C
IFuel lineIDefective fuel pump and relay C
IClogged fuel line C
ILack of or insufficient fuel B
IBeltIDefective timing C
ICompressionIIncorrect valve clearance B
ILoosened spark plugs or defective gasket B
ILoosened cylinder head bolts or defective gasket B
IImproper valve seating B
IDefective valve stem C
IWorn or broken valve spring B
IWorn or stuck piston rings, cylinder and piston B
IIncorrect valve timing A
IImproper engine oil (low viscosity) B
ILubrication systemIIncorrect oil pressure B
IDefective rocker cover gasket C
ICooling systemIOverheating C
IOthersIMalfunction of evaporative emission control system A
IStuck or damaged throttle valve B
IAccelerator cable out of adjustment C
74
2-3a[K100]DIAGNOSTICS
1. Engine Trouble in General

TROUBLE PROBLEM PARTS, ETC. POSSIBLE CAUSE RANK
3. Low output, hesitation and
poor accelerationIFuel injection system A
IIntake systemILoosened or cracked intake duct A
ILoosened or cracked PCV hose A
ILoosened or cracked vacuum hose B
IDefective intake manifold gasket B
IDefective throttle body gasket B
IDefective PCV valve B
ILoosened oil filter cap B
IDirty air cleaner element A
IFuel lineIDefective fuel pump and relay B
IClogged fuel line B
ILack of or insufficient fuel C
IBeltIDefective timing B
ICompressionIIncorrect valve clearance B
ILoosened spark plugs or defective gasket B
ILoosened cylinder head bolts or defective gasket B
IImproper valve seating B
IDefective valve stem C
IWorn or broken valve spring B
IWorn or stuck piston rings, cylinder and piston C
IIncorrect valve timing A
IImproper engine oil (low viscosity) B
ILubrication systemIIncorrect oil pressure B
ICooling systemIOverheating C
IOver cooling C
IOthersIMalfunction of evaporative emission control system A
4. SurgingIFuel injection system A
IIntake systemILoosened or cracked intake duct A
ILoosened or cracked PCV hose A
ILoosened or cracked vacuum hose A
IDefective intake manifold gasket B
IDefective throttle body gasket B
IDefective PCV valve B
ILoosened oil filter cap B
IDirty air cleaner element B
IFuel lineIDefective fuel pump and relay B
IClogged fuel line B
ILack of or insufficient fuel C
IBeltIDefective timing B
ICompressionIIncorrect valve clearance B
ILoosened spark plugs or defective gasket C
ILoosened cylinder head bolts or defective gasket C
IImproper valve seating C
IDefective valve stem C
IWorn or broken valve spring C
IWorn or stuck piston rings, cylinder and piston C
IIncorrect valve timing A
IImproper engine oil (low viscosity) B
ICooling systemIOverheating B
IOthersIMalfunction of evaporative emission control system C
75
[K100]2-3aDIAGNOSTICS
1. Engine Trouble in General