Fuel Tank: Description and Operation

Fuel Hoses, Lines And Fuel Tank Exploded View.:

Fuel Line Connections In Engine Compartment.:

FUEL SYSTEM DESCRIPTION
The SATURN fuel system is comprised of a polyethylene fuel storage tank. This tank is equipped with a submersible electric fuel pump, reservoir, and fuel level sending unit module attached at the top of the fuel tank. This module is held in place with a cam lock ring and sealed with a rubber O-ring seal. Fuel is drained from the tank by removing the filler tube at tank and pushing the check ball into the tank.

Fuel is delivered from the pump to the engine and from the engine back to the tank by way of nylon fuel lines with quick connect line connections. Before entering the engine, fuel passes through an in-line fuel filter also equipped with quick connects. Fuel vapor generated within the fuel storage tank is stored in a charcoal vapor canister where it is later purged and consumed by the engine.

FUEL PUMP MODULE AND GAUGE SENDING UNIT
The pump module has three places to attach hoses. One line is for the fuel feed line. The second line is connected to the vapor canister, to keep fuel vapor from getting into the air. The third line is used as a fuel return line to the tank.


FUEL LINES
Fuel lines can not be spliced. If they are damaged, they must be replaced with the same line.

NOTE: 1991 vehicles have a stone deflection shield to protect the line clip retaining nuts. 1992 vehicles have the stone shield integral with the clip and can be used to service 1991 vehicles. The line clip retaining nut must be protected from damage caused by stones and other foreign debris.