Question

رگلاژ کردن

 

Answer 1

"To tune"

to change the setting of particular parts of an engine, especially slightly, so that it works as well as possible:

The engine certainly needs tuning but there's nothing wrong with the car.

Could you tune (up) the engine for me, please?
 

Comments

Nice +

Answer 2

Regulate sth (may be)

or trim 

Answer 3

adjust