Important: The Throttle Position (TP) sensor, the fast idle air valve or any other
components containing rubber should not be placed in a solvent or cleaner
bath. A chemical reaction will cause these parts to swell, harden or distort.
Do not soak the throttle body with the above parts attached. If the throttle
body requires cleaning, soaking time in the cleaner should be kept to a minimum.
Some models have hidden throttle shaft dust seals that could lose their effectiveness
by extended soaking. These components should be cleaned in a cold immersion
cleaner such as Carbon X (X-55) or equivalent.
Removal Procedure
- Disconnect the negative battery cable.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing
any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to
the vehicle or its components.
- Relieve the fuel system
pressure. Refer to
Fuel Pressure Relief
.
- Drain the cooling system. Refer to Engine Cooling and Radiator.
- Remove the three bolts from the throttle cover.
- Remove the throttle cover to gain access to accelerator and throttle
cables.
- Disconnect the accelerator cable (1) from the throttle lever.
- Disconnect the throttle cable (2) (automatic transmission) from
the throttle lever.
- Loosen the clamp (4) to
the air intake hose (5).
- Remove the air intake hose (5) from the air intake pipe (2).
- Disconnect the two coolant hoses (7) from the air intake pipe.
- Remove the Positive Crankcase Ventilation (PCV) hose (8) from
the air intake pipe.
- Disconnect the Idle Air Control (IAC) valve air intake/hose (6)
from air intake pipe.
- Remove the three bolts (3) securing the intake air pipe.
- Loosen the clamp (1) at the throttle body.
- Remove the air intake pipe (2) from the throttle body.
- Disconnect the throttle
Position (TP) sensor electrical connector (2).
- Remove the nut from the accelerator cable bracket (1).
- Remove the bolt from the accelerator cable bracket (1).
- Remove the screw from the accelerator cable bracket.
- Remove the accelerator cable bracket (5) from the throttle body.
- Disconnect the Exhaust Gas Recirculation (EGR) solenoid vacuum
valve vacuum hose from the throttle body.
- Disconnect the two coolant hoses (3) from the throttle body.
- Remove the nut from the throttle body to the intake manifold (1).
- Remove the bolt from the throttle body to the intake manifold
(1).
- Remove the throttle body and gasket from intake manifold (4).
Disassembly Procedure
Important: Do not remove the fast idle air valve from
the throttle body. The fast idle air valve is not serviceable. The fast idle
air valve is calibrated at the factory and is not adjustable.
Important The TP sensor, fast idle air valve or other components containing
rubber must not be cleaned in a solvent or parts bath. A chemical reaction
will occur that can cause the parts to swell, harden or distort.
- Remove the two screws from the Throttle Position (TP) sensor to
the throttle body.
- Remove the Throttle Position (TP) sensor from the throttle body.
- Clean the passages by blowing with compressed air. Do not use
drills or wires, these may damage the passages.
- Clean all of the metal parts thoroughly and blow dry with shop
air.
- Be sure that all fuel and air passages are free of dirt or burns.
Assembly Procedure
- Install the TP sensor to throttle body.
- Secure the TP sensor with two screws. Do not tighten fully.
Installation Procedure
- Install the new gasket
and the throttle body to the intake manifold (4).
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Secure the throttle body with one nut
(1) and one bolt (1).
Tighten
Tighten the throttle body bolt and the nut to 18-28 N·m (13.5-20
lb ft).
- Connect the two coolant hoses to the throttle body (3).
- Secure the two coolant hoses with hose clamps.
- Connect the EGR solenoid vacuum valve vacuum hose to the throttle
body.
- Install the accelerator cable bracket (5) to the throttle body.
- Secure the accelerator cable bracket with one nut (1), one bolt
(1) and one screw.
Tighten
Tighten the throttle body nut and the bolt to 18-28 N·m (13.5-20
lb. ft).
- Connect the TP sensor electrical connector (2).
- Install the air intake
pipe (2) to throttle body.
- Secure the intake air pipe to the throttle body with the one clamp
(1).
- Secure the intake air pipe in place with three bolts (3).
Tighten
Tighten the three air intake pipe bolts to 15 N·m (11 lb
ft).
- Connect the IAC valve air intake hose to the air intake (4) pipe.
- Connect the PCV valve hose to the intake air pipe (8).
- Connect the two coolant hoses (7) to the intake air pipe.
- Secure the two coolant hoses with hose clamps.
- Connect the air intake hose (6) to the air intake pipe.
- Secure the air intake hose with one clamp.
- Connect the throttle cable
(2) (automatic transmission) to the throttle lever.
- Connect the accelerator cable (1) to the throttle lever.
- Install the throttle cover.
- Secure the throttle cover with three bolts.
Tighten
Tighten the throttle cover bolts to 15 N·m (11 lb ft).
- Adjust the accelerator cable. Refer to Accelerator Adjustment
Procedure.
- Adjust the throttle valve cable. Refer to Automatic Transmission
On-Vehicle Service.
- Adjust the TP sensor. Refer to Throttle Position (TP) Sensor Adjustment.
- Turn OFF the ignition.
- Check for any fuel leaks and repair as necessary.
- Refill the engine coolant to proper level. Refer to Engine Cooling
and Radiator.
- Connect the negative battery cable.