FUEL PUMP UNIT CONSTRUCTION/OPERATION[ZJ, ZY, Z6]
id0114c1101500
Without the fuel filter (high pressure)
With the fuel filter (high pressure)
Fuel Pump Unit
• Mainly consists of a fuel filter (high-pressure)(if equipped), pressure regulator, fuel pump, fuel reserve cup, and fuel filter (low-pressure).
• A pressure regulator is built-in due to the adoption of a returnless fuel system.
• A hard-plastic fuel pump unit, with an integrated fuel filter (high-pressure)(if equipped) and fuel pump, has been adopted to simplify the fuel line.
• The fuel pump unit cannot be disassembled.
Pressure Regulator
• Built into the fuel pump unit due to adoption of a returnless fuel system.
• Cannot be removed because it is integrated with the fuel pump unit.
• Mainly consists of a spring, release valve and diaphragm.
• Pressurizes fuel discharged by the fuel pump to approx. 380 kPa {3.87 kgf/cm2, 55.1 psi} using the spring, diaphragm and release valve, and then pumps it to the fuel distributor.
• If fuel pressure exceeds approx. 380 kPa {3.87 kgf/cm2, 55.1 psi}, the release valve opens to discharge unnecessary fuel pressure.
