Throttle Body Assemblies For Sale
In order for your engine to run, it requires air and fuel, with a spark to ignite the compressed air-fuel mixture. A throttle controls the amount of air that is drawn into the system. Common throttles use a butterfly valve but can use a pinch valve or barrel-type. This valve is part of the throttle body assembly.
Engines with fuel injection use a throttle body assembly that is often located between the air filter assembly and the intake manifold of the engine. A throttle valve is also used in carbureted engines. As you depress the accelerator, or throttle pedal, on your vehicle the valve opens to allow more air to flow. As more air enters, the amount of fuel increases to meet the required ratio.
Electronic Control Units (ECU)
Some vehicles use direct linkage from the accelerator pedal to the throttle to control the amount of air entering the system. Electronic throttle control systems use a motor to control the throttle linkages. In this system, the accelerator is connected to a sensor that sends information to the ECU. The ECU adjusts how much the throttle will open based on this signal.
Throttle Body Injection (TBI)
TBI systems are similar in design to carburetors. This version uses one or more fuel injectors set on top of the assembly. The injectors spray fuel through the valves, along with the air, for compression and combustion. As a note, Ford uses the term CFI instead of TBI.
Multi-Point Fuel Injection (MFI) throttle bodies
In an MFI system, the throttle body only controls the air that enters the system. The fuel injectors are separate from the assembly.
Idle Air Control (IAC)
Some engines use a secondary feature to control the amount of airflow when the vehicle is idling. An IAC uses a valve, controlled by a computer system, to regulate the airflow.
Higher performance vehicles may use more than one throttle body assembly. At the extreme performance end, Individual Throttle Bodies (ITBs) are used on each cylinder. In many cases, a thorough cleaning of the system will help maintain the correct idle and throttle response.
If cleaning the throttle assembly on your vehicle does not improve the performance, you may need to replace the assembly. Use the search bar located at the top of this page to find a great selection of throttle body assemblies for sale. You can count on us to find the right components for your vehicle that ensure the best performance.