Mitsubishi MOTORS Space Runner 1999 Workshop Manual Supplement page 472

Back-up ring
Fuel pressure sensor
GDI –
Fuel Pump (High Pressure)
EA FUEL PRESSURE HOSE INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pump (high pressure).
2. While being careful not to damage the O-ring, turn the
high-pressure fuel hose to the left and right and connect
it to the fuel pump (high pressure). After connecting, check
that the hose turns smoothly.
3. If the hose does not turn smoothly, the cause may be
that the O-ring is getting caught. Disconnect the hose,
check the O-ring for damage and re-connect the hose
to the fuel pump (high pressure) and then re-check.
FA BACK-UP RING/O-RING INSTALLATION
Install the back-up ring and the O-ring as shown in the
O-ring
illustration.
Caution
Take care not to install the back-up ring A for the injector,
fuel feed pipe or fuel return pipe by mistake. (Outer
diameter of the back-up ring for the fuel pressure sensor:
15.1 mm)
GA FUEL PRESSURE SENSOR/FLANGE
INSTALLATION
1. Apply a small amount of fresh engine oil to the O-ring.
Caution
Take care not to let any of the engine oil get inside
the fuel pressure regulator (high pressure) assembly.
2. Align the mating marks which were made at the time of
removal, and then install the fuel pressure sensor and
flange to the fuel pressure regulator (high pressure)
assembly.
Caution
If replacing the fuel pressure sensor with a new part,
the sensor and flange should be replaced together.
13A-113