Does the throttle control air intake or fuel intake?

[MacBrady]

The throttle controls air intake. Below is relevant information about the car throttle: 1. Function of the car throttle: In gasoline engines, the throttle does not control the fuel injection volume but regulates the opening degree of the throttle valve. A smaller opening means less mixture enters the cylinder, resulting in lower engine power output, and vice versa. 2. Solutions for a heavy throttle: Cleaning the fuel system can resolve a heavy throttle. Alternatively, try accelerating further to check if the engine speed increases but the vehicle speed does not. If this occurs, it may be due to a damaged sensor inside the transmission locking the overdrive gear.