Throttle Body: Service and Repair

Throttle Body (Typical)

Removal Procedure




1. Disconnect the negative battery cable.
2. Remove the air intake tube from the throttle body.
3. Disconnect the throttle cables by opening the throttle and moving the cable through the release slot.




4. Disconnect the vacuum hoses from the throttle body.
5. Disconnect the throttle position (TP) sensor and the idle air control valve connectors.




6. Remove the coolant hoses from the throttle body.
7. Remove the throttle body retaining bolts.
8. Remove the throttle body and discard the gasket.
9. Remove the TP sensor. Refer to "Throttle Position Sensor".
10. Remove the idle air control (IAC) valve. Refer to "Idle Air Control Valve".

Installation Procedure






NOTE: Use care in cleaning old gasket material from machined aluminum surfaces. Sharp tools may damage sealing surfaces.

1. Clean the gasket mating surface on the intake manifold.

NOTE: The throttle body may be cleaned following disassembly in a cold immersion-type cleaner. The throttle position sensor and the idle air control valve should not come in contact with any solvent or cleaner as they may be damaged.

2. Clean the throttle body.
3. Install the TP sensor. Refer to "Throttle Position Sensor".
4. Install the IAC valve. Refer to "Idle Air Control Valve".




5. Install the throttle body assembly with a new gasket to the intake manifold.
6. Install the throttle body retaining bolts.

Tighten
Tighten the throttle body retaining bolts to 15 N.m (11 lb.ft).

7. Install the coolant hoses.
8. Connect the vacuum hoses to the throttle body.

IMPORTANT: Make sure the throttle control cables do not hold the throttle open. With the engine OFF, check to see that the accelerator pedal is free.

9. Connect the throttle cables.




10. Install the air intake tube.
11. Connect the TP sensor connector and the IAC valve connector.
12. Connect the negative battery cable.
13. Fill the cooling system.