Mitsubishi MOTORS Space Runner 1998, Workshop Manual

Page: 334 / 1164

GDI <4G9> -
On-vehicle Service
13B-92
11. Measure fuel pressure while the engine is running at
idle.
Standard value: 4 - 7 MPa
12. Check to see that fuel pressure at idle does not drop
even after the engine has been raced several times.
13. If fuel pressure is out of the standard value, troubleshoot
and repair according to the table below.
Symptom Probable cause Remedy
D
Fuel pressure too low
D Fuel pressure drops after racing
Fuel leaking to return side due to poor
fuel pressure regulator (high pres-
sure) valve seating or settled spring
Replace fuel pressure regulator
(high pressure)
Low fuel pump (high pressure)
delivery pressure
Replace the fuel pump
(high pressure)
Fuel pressure too high Binding valve in fuel pressure
regulator (high pressure)
Replace fuel pressure regulator
(high pressure)
Clogged fuel return hose or pipe Clean or replace hose or pipe
14. Stop the engine and turn the ignition switch to OFF.
15. Disconnect the MUT-
II
.
FUEL LEAK CHECK
1. Connect the MUT-
II
to the diagnosis connector.
2. Disconnect the injector intermediate harness connector.
3. Turn the ignition switch to ON.
4. Select “Item No.74” from the MUT-
II
Data list.
5. Crank the engine continuously for 2 seconds or more,
and visually check that there are no fuel leaks from any
parts.
Caution
If any fuel leaks appear, stop cranking immediately
and repair the source of the leak.
6. Stop cranking and measure fuel pressure immediately
after 20 seconds.
Limit: Minimum 1 MPa
Injector intermediate
harness