Sure, but again: "how accelerator pedal tells engine to make higher vroom noise" is a very very basic part of understanding an engine. Omitting it leads to a b

Sure, but again: "how accelerator pedal tells engine to make higher vroom noise" is a very very basic part of understanding an engine. Omitting it leads to a big hole in the reader's understanding, since the accelerator pedal is likely their only method of interacting with an engine.