The secondary goal is to deliver the fuel as efficiently as possible. In modern times ... until the 1940s. Fuel injection ...

The debate doesn't end there, since there are various kinds of fuel injection systems in modern cars and motorcycles ... that given point in time. PFI, or Port Fuel Injection, was introduced ...

EFI and carbureted engines are subject to buildup, as well, but there's an increase in modern drivetrains ... including those found in GDI, port fuel injection (PFI), and throttle body injection ...