Ranger 4WD V6-3.0L VIN V Flex Fuel (1999)
Throttle Body: Description and Operation
Fuel Delivery Components
The throttle body controls airflow to the engine through a single butterfly-type valve.
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the throttle position is controlled by a conventional cable through throttle linkage.
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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.
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this bypass channel provides engine idle control as regulated by an Idle Air Control (IAC) valve assembly mounted directly to the throttle body.
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the valve assembly is an electromechanical device controlled by the powertrain control module which incorporates a linear actuator which
positions a variable area metering valve.
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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:
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factory-set throttle plate position at idle. DO NOT adjust or tamper with the throttle return control screw unless required by the Powertrain
Control/Emissions Diagnosis Manual1.
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a preset stop to locate the wide-open throttle position.
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a throttle body-mounted Throttle Position (TP) sensor.
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provision for Exhaust Gas Recirculation (EGR) valve.
