A factory-adjusted setscrew is used to limit the position of the throttle plate. NEVER attempt to adjust idle speed with this screw. Idle speed is controlled by the PCM based on sensor inputs.
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: there are three on the 4.7L engine; there are four on the others.
- Lift the throttle body from the intake manifold.
- Put a clean rag into the intake manifold to prevent the entry of foreign matter.
- Always use a new gasket.
- Reverse the removal procedure.
Tighten the throttle body bolts to the following torque:
2.5L, 8.0L engines: 8 ft. lbs. (11 Nm)