Removal & Installation
Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to come in contact with a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion. Fuel system work is made more hazardous by a hot engine. Work on a cold engine whenever possible.
Remove the air cleaner assembly.
Perform the fuel system depressurization procedure.
Disconnect the battery negative cable.
Disconnect all vacuum lines and electrical connectors from the throttle body. Tag for location, if necessary. Electrical connectors include TPS, MAP and IAC motor.
Disconnect cables: throttle, cruise control and others fitted.
Remove the throttle body bolts.
Lift the throttle body from the intake manifold.
Put a clean rag into the intake manifold to prevent the entry of foreign matter.
Fig. Throttle body-2.5L. Idle Air Control Motor (1) IAT Sensor (2) Throttle Body (3) Throttle Position Sensor (4) MAP Sensor (5) Idle Air Control Passage Inlet (6) Throttle Body Mounting Bolts (7) There are four mounting bolts.
Fig. Throttle body mounting bolts -3.9L, 5.9L engines.
Fig. Throttle body-3.7L, 4.7L. There are three mounting bolts.
Fig. Inspect throttle body O-ring and replace if necessary.
Fig. Thoroughly clean the gasket surface before reinstalling the throttle body (3.9L, 5.9L).
Fig. Install a new gasket on the intake manifold. Don't forget to remove the rag before installing the throttle body
Always use a new gasket. Inspect the O-ring between the throttle body and intake manifold on 3.7L and 4.7L engines and replace if cracked or distorted.
Reverse the removal procedure.
Tighten the throttle body bolts to the following torque:
2.5L: 8 ft. lbs. (11 Nm)
3.7L, 4.7L: 9 ft. lbs. (12 Nm)
3.9L, 5.9L: 17 ft. lbs. (23 Nm)