Page from a manual about fuel delivery systems, discussing scree…

9A-7 livery Systems FDS ms tour ltering or screening devices: sock is a screen located on the intake side of the fuel pump and is part of the fuel pump on the fuel rail port of the injector is part of the fuel injector assembly and cannot be serviced on the fuel inlet side of the pressure regulator is part of the fuel pressure regulator assembly serviced separately. 0 assembly is located between the fuel pump and the Schrader valve or injectors. This filter : - periodically by replacing it. Ive re Valve opens the return line to the tank when the fuel pressure on the shuttle diaphragm 1 spring force. The return flow is directed to the appropriate tank on vehicles equipped with alve, which is normally closed, opens when the outlet pressure from the energized pump a l ., check valve spring force. When the pump is deenergized (i.e., engine is shut off), the closes to maintain pump prime and fuel supply line pressure. pressure flow from the pump is diverted to operate the Venturi Jet Pump. The Venturi Pump ank into the assembly. This process ensures an adequate fuel supply to the pump during vers and steep vehicle attitudes with low-tank fuel fill levels. Pump has a nylon filter on it to prevent dirt and other particulate matter from entering the ltank can pass through the filter in small quantities. 1994 Powartrsin Control I Emissions Diagnosis July, 1993