Throttle Body: Service and Repair

REMOVAL

1. Disconnect negative battery cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the adaptive strategy.

2. Loosen air cleaner duct hose retaining clamps and remove hose.

3. Remove snow shield by removing three plastic push retainers which attach the shield to the power steering pump bracket and accelerator cable bracket.

Throttle Cable:

4. Disconnect throttle cable and Throttle Valve (TV) cable from throttle body linkage.

5. Mark location and remove vacuum hoses at vacuum tree.

6. Disconnect and remove the accelerator and speed control cables from the accelerator mounting bracket and throttle lever.

7. Remove the alternator support brace.

Alternator Bracket:

8. Remove the wiring harness connector carefully at the throttle position sensor, intake air temperature sensor, and idle air control valve.

9. Loosen and remove six throttle body retaining bolts.

10. Lift and remove throttle body assembly from intake manifold.

INSTALLATION

1. Clean and inspect the mounting faces of the lower and upper intake manifolds. Both assemblies must be clean and flat.

NOTE: If scraping is necessary, be careful not to damage the throttle body or lower intake manifold, or allow material to enter the intake manifold.

2. Clean and lightly oil all bolt and stud threads prior to installation.

3. Position new gasket on lower intake mounting face. The use of alignment studs may be helpful.

4. Install upper intake manifold and throttle body assembly to lower manifold.

Intake Plenum Removal/Installation:

5. Aligning bolt holes, install throttle body on intake manifold. Install two stud bolts and four retaining bolts. Tighten to 25 Nm (19 lb ft) in sequence shown.

6. Install alternator brace to throttle body and alternator bracket. Tighten nuts to 16 Nm (12 lb ft).

7. Connect PCV hose to tube underneath throttle body.

8. Connect vacuum hoses.

9. Connect electrical connections to the throttle position sensor, intake air temperature sensor, and idle air control valve.

10. Connect throttle cable to throttle body linkage.

11. Connect air cleaner duct hose to throttle body and air cleaner assembly. Tighten clamp to 4.0 Nm (36 lb in).

12. Connect negative battery cable.

13. Start engine and check for vacuum leaks. Adjust idle speed as necessary.

14. Install shield onto idle speed control solenoid. Tighten bolts to 1.4 Nm (13 lb in).