Throttle Valve Actuators known as TVA regulate the air or mixture supplied for the combustion engine. Depending on the engine concept, this serves different purposes.
In the case of petrol engines, speed and power output are regulated by means of fresh air or mixture dosing.
Diesel engines generally do not need a throttle valve. However, in modern diesel cars throttling the amount of intake air facilitates precision control for Exhaust Gas Recirculation and stops the engine from shaking when the ignition is switched off.
The TVA is often linked to many problems by our costumers. Evolved-Tuning now allows the TVA to be fully removed and will remove any problem (if any are presented) from ECU.