Toyota 4-Runner 1985 Repair Manual page 253

FU-10
BATTERY
FUEL SYSTEM - Carburetor
FU0274
GENERAL CLEANING PROCEDURE
CLEAN DISASSEMBLED PARTS BEFORE INSPECTION
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(a) Wash and clean the cast parts with a soft brush and
carburetor cleaner.
(b) Clean off the carbon around the throttle valve.
(c) Wash the other parts thoroughly in carburetor cleaner.
(d) Blow all dirt and other foreign matter from the jets,
fuel passages and restrictions in the body.
INSPECTION OF CARBURETOR
1. INSPECT FLOAT AND NEEDLE VALVE
(a) Inspect the pivot pin (1 ) for scratches and excessive
wear.
(b) Inspect the float (2) for broken lip or wear in the pivot
pin holes.
(c) Inspect the spring (3) for breaks or deformation.
(d) Inspect the needle valve (4) and plunger (5) for wear
or damage.
(e) Inspect the strainer (6) for rust or breaks.
2. INSPECT POWER PISTON
Make sure that power piston moves smoothly.
3. INSPECT POWER VALVE
Check for faulty opening and closing action.
4. INSPECT FUEL CUT SOLENOID VALVE
(a) Connect the terminals to the battery terminals.
(b) You should feel a click from the solenoid valve when
the battery power is connected and disconnected.
If the solenoid valve is not operating properly, replace it.
(c) Replace the O-ring.