The phrase "throttle pedal" refers to the foot-operated pedal in a vehicle that controls the flow of fuel to the engine. When you press the throttle pedal with your foot, it increases the engine's power and speed. Full definition
I put a brand new throttle body and throttle pedal position sensor on it and changed out the spark plugs and wires. (yourmechanic.com)
It has a number of tangible effects on the powertrain including a sharper throttle response, with the engine delivering more torque during the early stages of throttle pedal travel. (ausmotive.com)
It gives options for steering weight, throttle pedal mapping and engine response and gearbox shift characteristics. (motoring.com.au)