Throttle Body: Service and Repair

Removal
1. Disconnect battery ground cable.

2. Disconnect crankcase ventilation tube and aspirator hose from air cleaner outlet tube. Loosen engine air cleaner tube clamps and remove air cleaner outlet tube.

3. Remove retaining bolts and accelerator cable shield from throttle body.

4. Disconnect accelerator cable and speed control actuator cable from throttle body lever.

5. Remove two accelerator cable bracket retaining bolts from throttle body. Position accelerator cable bracket, accelerator cable and speed control actuator cable out of the way.

6. Disconnect wiring connections for the engine control sensor wiring from the idle air control valve (IAC) valve and TP sensor.

7. Remove water bypass hoses from the throttle body.

WARNING: ENGINE COOLING SYSTEM MAY BE UNDER PRESSURE. RELEASE PRESSURE AT RADIATOR CAP BEFORE REMOVING HOSES.

8. If required, remove the idle air control valve and gasket from the surge tank connector. Discard gasket.

9. Remove the throttle body retaining nuts and bolts (note location for installation).

10. Remove throttle body from surge tank connector. Discard gasket.

11. Discard throttle body gasket.






Installation
1. CAUTION: Use care when cleaning gasket material because aluminum gouges easily which forms leak paths.

NOTE: If scraping is necessary, do not damage gasket surfaces or allow gasket material to enter intake manifold.

Clean and inspect sealing surfaces of surge tank connector and throttle body.

2. Install new throttle body gasket.

3. Position throttle body and install retaining bolts and nuts. Tighten to: 16-23 Nm (12-16 lb.ft).

4. If removed, install idle air control valve with a new gasket to the surge tank connector and tighten retaining bolts to: 9.5 Nm (84 lb.in).

5. Connect water bypass hoses and position clamps securely. Refill and bleed engine cooling system.

6. Connect wiring connectors for engine control sensor wiring to the throttle position sensor and idle air control valve.

7. Install accelerator cable bracket to the throttle body. Tighten retaining bolts to: 17 Nm (12 lb.ft).

8. Connect accelerator cable and speed control actuator cable to the throttle body lever.

9. Install accelerator cable shield. Tighten retaining bolts to: 1.4 Nm (12 lb.in).

10. Connect air cleaner outlet tube to the throttle body and engine air cleaner. Tighten engine air cleaner tube clamps to: 1.4-2.5 Nm (13-22 lb.in).

11. Connect crankcase ventilation tube and aspirator hose to the air cleaner outlet tube.

12. Connect battery ground cable.

13. Start engine and check for vacuum and engine coolant leaks.