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Disconnect harness connector from IAC valve. Remove IAC
valve, gasket and "O" ring from throttle body assembly.
CAUTION: DO NOT manually extend or retract pintle if IAC valve has
been in service, or damage to worm gear will result.
NOTE:
Before installation, clean "O" ring sealing surface, pintle
seat and air passage. If air passage has heavy deposits,
remove throttle body for complete cleaning.
Installation
1) Inspect "O" ring for damage. Replace as necessary. If
reusing IAC valve, DO NOT push or pull on pintle. Threads on worm gear
will be damaged.
2) If replacing IAC valve, measure distance between tip of
new IAC valve pintle and mounting flange. Distance should not exceed 1
1/8" (28 mm). If distance is more than specified, use finger pressure
to slowly retract pintle. Lubricate "O" ring with clean engine oil.
3) Apply Thread Locking Compound (Loctite 262) onto IAC valve
retaining screw threads. Install IAC valve onto throttle body. Tighten
IAC valve retaining screws to specification. See INSTALLATION.
Reconnect IAC valve harness connector.
4) To reset IAC valve pintle position, turn ignition on for
20 seconds. Turn ignition off for 10 seconds. Start engine and check
for proper idle operation. Repeat procedure if proper idle operation
is not obtained.
Removal & Installation (1.3L & 1.8L)
Remove throttle body assembly. See THROTTLE BODY. Drain any
remaining engine coolant. Remove 4 IAC valve screws and remove IAC
valve from throttle body assembly. Install NEW rubber gasket onto
throttle body assembly. Install IAC valve onto throttle body assembly
and tighten IAC valve retaining screws to specification. See
TORQUE SPECIFICATIONS. To complete installation, reverse removal
procedure.
THROTTLE BODY
WARNING: Ensure residual fuel pressure is relieved before working on
throttle body.
Removal
1) Relieve fuel pressure. See
FUEL SYSTEM PRESSURE RELEASE (GASOLINE). Disconnect negative battery
cable. Remove air intake ducts. Disconnect and mark harness
connections and vacuum hoses from throttle body. Disconnect control
cables from throttle body.
2) Drain cooling system and remove coolant hoses to throttle
body (if applicable). Remove throttle body retaining bolts. Remove
throttle body and gasket.
NOTE:
Identification number is stamped on throttle body. Use
identification number to order replacement components.
Installation
1) To install, reverse removal procedure using NEW gasket.
Tighten throttle body retaining bolts to specification. See
TORQUE SPECIFICATIONS. Refill cooling system (if drained).
2) If installing NEW Idle Air Control (IAC) valve, ensure IAC
pintle length setting is adjusted before installation (if applicable).
See IDLE AIR CONTROL VALVE. Adjust idle speed and TP sensor (if
removed, and if adjustable). See appropriate ON-VEHICLE ADJUSTMENTS
article.
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