Fuel System Trouble In General - Subaru 2002 IMPREZA Service Manual

FUEL SYSTEM TROUBLE IN GENERAL
FUEL
INJECTION
(FUEL
SYSTEMS)
1)
32.Fuel System Trouble in Gen-
A: INSPECTION
eral
Fuel pump will not operate.
0 Defective terminal contact.
0 Trouble in electromaanetic or electronic circuit parts.
Inspect connections, especially ground, and tighten
securely.
Replace fuel pump.
Trouble and possible cause
1
Corrective action
2)
3)
4)
5 )
6)
7)
1. Insufficient fuel supply to the injector
Lowering of fuel pump function.
Clogged dust or water in the fuel filter.
Clogged or bent fuel pipe or hose.
Air is mixed in the fuel system.
Clogged or bent breather tube or pipe.
Damaaed diaphraam of pressure reaulator.
Replace fuel pump.
Replace fuel filter, clean or replace fuel tank.
Clean, correct or replace fuel pipe or hose.
Inspect or retighten each connection part.
Clean, correct or replace air breather tube or pipe.
Replace.
3)
4)
5 )
Defective welding part on the fuel tank.
Defective drain packing of the fuel tank.
Clogged or bent air breather tube or air vent tube.
Replace.
Replace.
Clean, correct or replace air breather tube or air vent
tube.
2.Fakacle or blow out fuel
1)
2)
1)
1 I
Loosened joints of the fuel pipe.
I
Retightening.
Defective operation of fuel level sensor.
Defective operation of fuel meter.
Replace.
Replace.
2)
I I
Cracked fuel pipe, hose and fuel tank.
I
Replace.
3. Gasoline smell inside of compartment
1 I
Loose joints at air breather tube, air vent tube and fuel
Retightening,
filler Dioe.
1)
I 1 I . I
2)
I
I
Defective Dackina air tiahtness on the fuel saucer.
1
Correct or replace packina.
3 )
1 - I
Cracked fuel separator.
I
Replace separator.
4)
1 I
Inoperative fuel pump modulator or circuit.
I
Replace.
4. Defective fuel meter indicator
- 1
I
r
I
Larae operation noise or vibration of fuel pump.
1
Replace.
~~
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 cool-
ing system. Refueling will also complement the
effect of anti-freeze solution each time the fuel
level drops to about one-half. After the winter
season, drain the water which may have accu-
mulated in the fuel filter and fuel tank in the man-
ner 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.
FU(D0HC TURBO)-71