Subaru 1600 Service Manual page 166

FUEL SYSTEM
3. Other Components
Trouble and possible cause
Corrective action
I.
Insufficient fuel supply to the carburetor
1)
Fuel pump will not operate
0
Defective terminal contact.
Inspect connections, especially ground, and tighten
securely.
o Trouble in electromagnetic or electronic
Replace fuel pump.
circuit 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
2. Leakage or blowout fuel
I)
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
Retightening
and 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
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
NOTE:
a. When the vehicle is left unattended for an extended period of time.
(i)
Water may accumulate in the fuel tank. To prevent water condensation, top off the fuel tank or drain the fuel
completely.
(ij)
Also drain water condensation from the fuel filter.
b. Refilling the fuel tank.
(i)
Refill the fuel tank while there is still some fuel left in the tank.
c. Protecting the fuel system against freezing and water condensation.
(i)
Cold areas .
In snow-covered areas, mountainous areas, skiing areas, etc. where ambient temperatures drop below
oDe
(32°F),
4-44