Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 125

FU(w/o STI)-27

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

4) Disconnect  the  vacuum  hose  (B)  and  the  con-

nector (C) from the fuel pipe, and remove the purge

control solenoid valve 1 from the intake manifold.

5) Disconnect the filter assembly.

6) Disconnect  the  connector  from  the  wastegate

control  solenoid  valve  and  the  manifold  absolute

pressure  sensor,  and  remove  the  solenoid  valve

bracket assembly from the intake manifold.

7) Disconnect the connector from the purge control

solenoid valve 2, and disconnect the vacuum hose

from the intake duct and the fuel pipe.

8) Disconnect the connectors from the throttle posi-

tion sensor.

9) Remove the throttle body from the intake mani-

fold.

10) Disconnect the connector from the fuel injector

and tumble generator valve assembly.

• RH side

• LH side

11) Remove the PCV pipe (A), harness assembly

(B),  intake  duct  (C),  brake  booster  vacuum  hose

(D) and vacuum hose (E) from the intake manifold.

FU-05440

(A)

(B)

(C)

FU-05342

FU-05365

FU-05673

FU-05674

FU-06541

FU-06542

FU-06543

(C)

(A)

(D)

(E)

(B)

FU(w/o STI)-28

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

12) Remove the bolt which secures the fuel injector

pipe LH onto the intake manifold, and disconnect

the  pressure  regulator  vacuum  hose  from  the  in-

take manifold.

13) Remove the bolts which hold fuel injector pipe

onto intake manifold.

• RH side

• LH side

14) Remove the fuel injector.

• RH side

• LH side

15) Remove the bolts which hold fuel pipe onto in-

take manifold.

16) Remove the bolt which holds fuel injector pipe

RH onto intake manifold.

17) Loosen the clamp which holds the fuel hose to

the fuel injector pipe RH and the fuel pipe, and then

disconnect the pipe from the fuel hose.

18) Remove the fuel injector pipe and the fuel pipe.

FU-06544

FU-06545

FU-06560

FU-06546

FU-06547

FU-05236

FU-05715

FU-05237

FU(w/o STI)-29

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

19) Remove the tumble generator valve assembly

from the intake manifold.

20) Remove the nipple from the intake manifold.

D: ASSEMBLY

1) Apply liquid gasket to the nipple threads, and in-

stall the nipple to the intake manifold.
Liquid gasket:

THREE BOND 1105 (Part No. 004403010) or 

equivalent

Tightening torque:

23 N·m (2.3 kgf-m, 17.0 ft-lb)

2) Install the tumble generator valve assembly onto

intake manifold.
NOTE:

Use new O-rings.
Tightening torque:

8.3 N·m (0.8 kgf-m, 6.1 ft-lb)

3) Install the fuel injector pipe.

FU-04751

FU-05688

FU-05689

FU-04751

FU(w/o STI)-30

Intake Manifold

FUEL INJECTION (FUEL SYSTEMS)

4) Connect fuel hoses to the fuel injector pipe and

the fuel pipe. <Ref. to FU(w/o STI)-93, CONNECT-

ING  FUEL  DELIVERY  HOSE,  FUEL  RETURN

HOSE  AND  FUEL  HOSE,  INSTALLATION,  Fuel

Delivery, Return and Evaporation Lines.>

5) Secure the fuel injector pipe RH to intake mani-

fold with bolt.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

6) Secure  the  fuel  pipe  to  intake  manifold  with

bolts.
Tightening torque:

6.4 N·m (0.7 kgf-m, 4.7 ft-lb)

7) Install the fuel injector.
NOTE:

Use new O-rings, rubbers and seal rings.

• RH side

• LH side

8) Secure the fuel injector pipe to intake manifold

with bolts.
Tightening torque:

19 N·m (1.9 kgf-m, 14.0 ft-lb)

• RH side

• LH side

FU-05237

FU-05715

FU-05236

FU-06546

FU-06547

FU-06545

FU-06560