Subaru XT 1988 Service Manual page 388

FUEL SYSTEM 2-8
TROUBLESHOOTING
Trouble and possible cause
Corrective action
--
1. Insufficient fuel supply to the injector
1 ) Fuel pump will not operate.
0 Defective terminal contact. Inspect connections, especially ground, and tighten
securely.
0
Trouble in electromagnetic or electronic circuit Replace fuel pump.
parts.
2)
Lowering of fuel pump function. Replace fuel pump.
3)
Clogged dust or water in the fuel filter. Replace fuel filter, clean or replace fuel tank.
4)
Clogged or bent fuel pipe or hose. Clean, correct or replace fuel pipe or hose.
5)
Air is mixed in the fuel system. Inspect or retighten each connection part.
6)
Clogged or bent air breather tube or pipe. Clean, correct or replace air breather tube or pipe.
7)
Fuel damper will not operate. Replace.
8)
Damaged diaphragm of pressure regulator. Replace.
2.
Leakage or blowout fuel
1) Loosened joints of the fuel pipe. Retightening.
2)
Cracked fuel pipe, hose and fuel tank. Replace.
3)
Defective welding part on the fuel tank. Replace.
4)
Defective drain packing of the fuel tank. Replace.
5)
Clogged or bent air breather tube or air vent tube.
Clean, correct or replace air breather tube or air vent
tube.
3.
Gasoline is smelling inside of compartment
1) Loosened joints at air breather tube, air bent tube and Retighteni ng.
fuel filler pipe.
2)
Defective packing air tighteness on the fuel saucer. Correct or replace packing.
3)
Cracked fuel separator.
Replace separator.
4.
Defective fuel meter indicator
I
1 )
Defective operation of fuel meter unit. Replace.
2)
Defective operation of fuel meter.
Replace.
5.
Noise
1) Large operation noise or vibration of fuel pump. Replace.
a. When the vehicle is left unattended for an extended period of time.
1) Water may accumulate in the fuel tank. To prevent water condensation, top off the fuel tank or drain the fuel completely.
2) Also drain water condensation from the fuel filter.
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