Subaru 1600 Service Manual page 164

Trouble
3. Rough idle
4. Low power
output
S. Hesitation and/or
poor acceleration
•
FUEL SYSTEM
Possible cause
h. Flooding.
i. Feedback pulse solenoid not functioning.
j. Damaged choke break diaphragm.
a. Dirty or clogged main system.
b. Improper throttle valve opening.
c. Choke valve not opening fully.
d. Feedback pulse solenoid not functioning.
e. Dirty fuel filter.
f. Low fuel pressure.
g. Restriction in exhaust system.
h. Bowl vent solenoid not functioning.
a. Dirty or clogged main jet or main system.
b. Improper float level.
c. Improper idle adjustment.
d. Connecting rod not installed properly.
e. Clogged accelerating pump nozzle.
f. Dirty or damaged intake or discharge
check balls for accelerating pump.
g. Damaged or disconnected accelerating
pump fuel delivery tube.
h. Damaged accelerating pump diaphragm.
i. Feedback pulse solenoid not functioning.
j. Fuel nIter dirty .
4-42
Corrective action
See section" I Flooding".
See section "2 f".
Inspect and replace;
Clean.
Inspect and adjust throttle cable.
Check to make sure choke valve does not
bind.
Check to make sure choke coil assembly
has electric supplied.
Check to make sure choke coil assembly
does not have an open circuit - if so
replace.
Make sure wire connections are clean and
tight.
Make sure electronic control module is
operating correctly, check feedback pulse
solenoid for continuity and for shorts or
grounded wires - replace if damaged.
Replace fuel filter.
Repair or replace fuel pump.
Inspect exhaust system carefully and
replace any faulty parts.
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 re-adjust float level.
Re-adjust idle settings.
Make sure connecting rod is attached at
both ends and that bushings are in good
shape.
Clean.
Clean or replace.
Re-connect or replace delivery tube.
Inspect and replace.
Make sure wire connections are clean and
tight.
Make sure electronic control module is
operating correctly.
Check feedback pulse solenoid· for con-
tinuity and for shorts or grounded wires -
replace if damaged.
Replace.