Mazda 2004 RX-8, Особенности сервиса

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FUEL SYSTEM
01–14–6
FUEL PUMP UNIT CONSTRUCTION/OPERATION
CHU011413350S04
Fuel Pump Unit
•
Mainly consists of a fuel filter (high-pressure), pressure regulator, fuel pump, fuel reserve cup, fuel filter (low-
pressure), and fuel pump (transfer).
•
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) and fuel pump, has been adopted to
simplify the fuel line.
•
The fuel pump unit, located on top of the fuel tank, can be removed and installed through the service hole in the
bottom of the rear seat.
•
The fuel pump unit cannot be disassembled.
•
Fuel in the fuel reserve cup is suctioned out through the fuel filter (low-pressure) by the fuel pump, and pumped
to the fuel filter (high-pressure). Return fuel is sent back to the fuel reserve cup or the fuel tank through the jet
pump.
•
A venturi, located in the path of fuel returning from the pressure regulator, creates negative pressure that is
used to transfer fuel from the reserve to the main tank.
•
If return fuel pressure exceeds the specified value, the relief valve discharges return fuel into the fuel pump unit
without passing it through the venturi. Due to this, return fuel pressure is maintained below the specified value.
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. 390 kPa {3.98 kgf/cm
2
, 56.6 psi} with the spring,
diaphragm and release valve, and then pumps it to the fuel distributor.
•
If fuel pressure exceeds approx. 390 kPa {3.98 kgf/cm
2
, 56.6 psi} , the release valve opens to discharge
unnecessary fuel pressure.
End Of Sie
QUICK RELEASE CONNECTOR FUNCTION
CHU011442692S01
•
Quick release connectors that can be connected/disconnected without an SST have been adopted to improve
serviceability.
End Of Sie
QUICK RELEASE CONNECTOR CONSTRUCTION/OPERATION
CHU011442692S02
•
Mainly consists of a retainer and O-ring. The quick release connector is integrated with the fuel hose and
therefore cannot be disassembled.
•
When the quick release connector is connected, the fuel pipe projection is locked at the clamp lock point. If the
clamp release tab is pushed to expand the clamp, the lock point is released allowing the fuel pipe to be
disconnected.
•
To connect the quick release connector properly, push it into the fuel pipe until a locking click sound is heard.
TAB
LOCK POINT
QUICK RELEASE
CONNECTOR
CHU0114S008