Subaru ff-1/1300/1400/1600/1800/Brat 1970-1984 Repair Guide

Understanding the Fuel System


An automotive fuel system consists of everything between the fuel tank and the carburetor or injection system. This includes the tank itself, all the lines, one or more fuel filters, a fuel pump, and the carburetor, fuel rail or injectors.

With the exception of the carburetor, fuel rail or injectors the fuel system is quite simple in operation. Fuel is drawn from the tank through the fuel line by the fuel pump, which forces it to the fuel filter, and from there to the carburetor, fuel rail or injectors, where it is distributed to the cylinders.

For a description of the injection system used on the 1800 Turbo, turn to the section devoted to it behind carburetor adjustments. Repair procedures are also located there.