In Many Fuel Injected Engines, The Throttle Body Is The Portion Of The Air Intake System That Regulates The Amount Of Air Flowing Into The Engine, In Reaction To The Driver Accelerator Pedal Response In The Main. The Throttle Body Is Generally Located Between The Air Filter Box And The Intake Manifold, And It Is Commonly Attached To, Or Near, The Mass Airflow Sensor. The Biggest Piece Inside The Throttle Body Is The Throttle Plate, Which Is A Butterfly Valve That Controls The Airflow.
The accelerator pedal motion is converted via the throttle cable, to activate the throttle linkages, which move the throttle plate. In cars with electronic throttle control, an electric motor regulates the throttle linkages and the accelerator pedal connects not to the throttle body, but to a sensor, which directs the pedal position to the Engine Control Unit (ECU). The ECU determines the throttle opening based on accelerator pedal position and records from other engine sensors. Throttle bodies may also contain valves and adjustments to direct the minimum airflow during idle. Even in those units that are not "drive-by-wire", there will often be a tiny electric motor driven valve, the Idle Air Control Valve (IACV), which the ECU uses to control the amount of air that can bypass the main throttle opening.
Carburetors combine the functionality of the throttle body and fuel injectors into one in order to moderate the amount of airflow and to combine air and fuel together. Cars with throttle body injection (called TBI by General Motors and CFI by Ford) locate the fuel injectors in the throttle body, thereby allowing an older engine to be changed from carburetor to fuel injection without significantly altering the engine design.
- Part # 69220
- Polished finish. Power Throttle Bodies for Ford 4.6l V8s are beautifully crafted from precision die castings. A die casting is a much higher quality casting than produced by conventional sand castings with reduced porosity and a better finish. All 4.6l throttle bodies through 2004 applications have C.A.R.B. approval making them street legal in California and other states which utilize similar regulations as California.
- Part # 69221
- Polished finish. Power Throttle Bodies for Ford 4.6l V8s are beautifully crafted from precision die castings. A die casting is a much higher quality casting than produced by conventional sand castings with reduced porosity and a better finish. All 4.6l throttle bodies through 2004 applications have C.A.R.B. approval making them street legal in California and other states which utilize similar regulations as California.
- Part # 69222
- 70MM Throttle Body for 1996-'04 Mustang 4.6L 2V V8- Satin finish. Power Throttle Bodies for Ford 4.6l V8s are beautifully crafted from precision die castings. A die casting is a much higher quality casting than produced by conventional sand castings with reduced porosity and a better finish. All 4.6l throttle bodies through 2004 applications have C.A.R.B. approval making them street legal in California and other states which utilize similar regulations as California.
- Part # 69225
- 75MM Throttle Body for 1997-'04 4.6L & 5.4L Ford F-Series- Satin. Professional Products line of throttle bodies are generally considered by the performance industry as the highest quality throttle body available. These throttle bodies are precision engineered and many of them are made of aluminum die castings which is the same process used by the original equipment manufacturers.
- Part # 69233
- 75MM Throttle Body for 1989-'93 Ford V6 Thunderbird Super Coupe and Mercury Cougar XR7- Satin finish. The Power Throttle Body for Ford Thunderbirds is a variation of the late model Mustang unit. However, this Throttle Body has the correct Thunderbird mounting hole pattern to bolt to the intake manifold along with the special Thunderbird throttle linkage. Available in a show polished or satin finish in a 75mm bore size.
- Part # 69402
- The Professional Power Throttle Bodies all use special gaskets since they have a larger bore than the stock throttle body gasket. We now offer a complete lineup of replacement throtte body gaskets to suit our Power Throttle Bodies. In instances where several different bore sizes are offered for a particular model, the kit has the gasket for the largest bore size.
- Part # 69401
- The Professional Power Throttle Bodies all use special gaskets since they have a larger bore than the stock throttle body gasket. We now offer a complete lineup of replacement throtte body gaskets to suit our Power Throttle Bodies. In instances where several different bore sizes are offered for a particular model, the kit has the gasket for the largest bore size.