Fuel System Trouble In General - Subaru IMPREZA 2002 Service Manual

FUEL SYSTEM TROUBLE IN GENERAL
FUEL INJECTION (FUEL SYSTEMS)
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Defective terminal contact.
29.Fuel System Trouble in General
A: INSPECTION
Inspect connections, especially ground, and tighten
securely.
Trouble and possible cause
1. Insufficient fuel supply to the injector
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Fuel DumD will not oDerate.
1
Corrective action
1
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2)
3)
4)
5 )
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.
Replace fuel pump.
Replace fuel filter, clean or replace fuel tank.
Clean, correct or replace fuel pipe or hose.
Inspect or retiahten each connection part.
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Trouble in electromagnetic or electronic circuit parts.
1
Replace fuel pump.
1)
2)
3)
Loosened joints of the fuel pipe.
Cracked fuel pipe, hose and fuel tank.
Defective weldina Dart on the fuel tank.
Retightening.
Replace.
Replace.
6)
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Clogged or bent breather tube or pipe.
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Clean, correct or replace air breather tube or pipe.
Loose joints at air breather tube, air vent tube and fuel
filler pipe.
1)
Retightening,
4 ) I
Defective drain packing of the fuel tank.
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Replace.
3)
4)
Clean, correct or replace air breather tube or air vent
5 )
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Clogged or bent air breather tube or air vent tube.
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tube.
Cracked fuel separator. Replace separator.
Inoperative fuel pump modulator or circuit. Replace.
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3.
Gasoline smell inside of comeartment
2)
1
Defective packing air tightness on the fuel saucer.
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Correct or replace packing.
2 )
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Defective operation of fuel meter.
1
Replace.
5. Noise
1)
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Large operation noise or vibration of fuel pump.
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Replace.
NOTE:
effect of anti-freeze solution each time the fuc
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
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.
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