Subaru 1600 Service Manual page 165

Trouble
S. Hesitation and/or
poor acceleration
6. Poor high-speed
performance
7. Difficult starting
at low tempera-
tures
FUEL SYSTEM
Possible cause
k. Fuel pump pressure low.
I. Bowl vent solenoid not functioning.
a. Dirty or clogged main jet or main system.
b. Improper throttle valve opening.
c. Improper float level.
d. Feedback pulse solenoid not functioning.
e. Bowl vent solenoid not functioning.
f. Dirty fuel filter.
g. Fuel pump pressure low.
h. Restriction in exhaust system.
a. Malfunction of choke valve and linkage.
b. Improper adjustment of choke system.
c. Improper fast idle speed.
q.
Vacuum supply hose to choke break
diaphragm clogged or cracked.
e. Damaged choke break diaphragm.
f. Feedback pulse solenoid not functioning.
4-43
Corrective action
Repair or replace.
Check solenoid for continuity and for
shorts or grounds.
Check to make sure that power supply to
bowl vent solenoid is good.
Clean.
Inspect and adjust throttle cable.
Adjust float level.
Make sure wire connections are clean and
tight.
Make sure electronic control module is
opera ting correctly.
Check feedback pulse solenoid for con-
tinuity and for shorts or grounded wires
replace if damaged.
Check solenoid for continuity and for
shorts or grounds.
Check to make sure that power supply to
bowl vent solenoid is good.
Replace.
Repair or replace.
Inspect exhaust system carefully and
replace any faulty parts.
Make sure valve does not stick and that
valve closes fully.
Make sure all adjustments are correct.
Adjust fast idle.
Inspect and replace.
Inspect and replace.
Make sure wire connections are clean and
tight.
Make sure electrailic control module is
operating correctly.
..;/J
Check feedback pulse
s~noid
for con-
tinuity and for shorts or grounded wires -
replace if damaged.