Throttle Body
WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
The throttle body controls airflow to the engine through a single butterfly-type valve.
- The throttle position is controlled by a conventional cable through throttle linkage.
- The body is a single-piece die casting made of aluminum and has a single bore with an air bypass channel around the throttle plate.
- This bypass channel provides engine idle control as regulated by an idle air control (IAC) valve assembly.
- The valve assembly is an electromechanical device controlled by the PCM which incorporates a linear actuator which positions a variable area metering valve.
- A sealant is applied to the throttle plate and bore area to reduce closed plate-to-bore airflow. The sealant should not be removed or cleaned.
Other features of the throttle body include:
- Factory-set throttle plate position at idle. DO NOT adjust or tamper with the throttle return control screw.
- A preset stop to locate the wide-open throttle position (WOT).
- A throttle body-mounted throttle position (TP) sensor.