Fuel Filter: Description and Operation

PURPOSE
Clean fuel is extremely important in a fuel injection system because of the small orifice in the injector tip through which fuel must pass.

LOCATION
Most injection systems use three forms of filters:

- The fuel strainer or filter is attached to the fuel pump inlet, in the fuel tank.

In-Line Fuel Filter:

- Additional filtration is provided by a high capacity in-line filter, located along the chassis frame rail.

Fuel Injector:

- The final line of defense against fuel contamination is in the fuel injector. Each injector contains its own inlet filter screen.

CONSTRUCTION
The fuel strainer or filter is constructed of woven plastic. The filter is self-cleaning and requires no maintenance.

The high capacity in-line filter is one piece construction that cannot be cleaned.


NOTE: When replacing fuel filters, use the filter specified for the vehicle being serviced.