Infiniti QX56 (Z62). Manual - part 544
EC-154
< BASIC INSPECTION >
[VK56VD]
FUEL PRESSURE
4.
Connect fuel hose for fuel pressure check (1) to fuel tube
(engine side) with clamp (2) as shown in the figure.
CAUTION:
• Wipe off oil or dirt from hose insertion part using cloth
moistened with gasoline.
• Apply proper amount of gasoline between top of the fuel
tube (3) and No.1 spool (4).
• Insert fuel hose for fuel pressure check until it touches
the No.1 spool on fuel tube.
• Use NISSAN genuine hose clamp (part number: 16439
N4710 or 16439 40U00).
• When reconnecting fuel line, always use new clamps.
• Use a torque driver to tighten clamps.
• Install hose clamp to the position within 1 - 2 mm (0.04 - 0.08 in).
• Make sure that clamp screw does not contact adjacent parts.
5.
Connect fuel tube adapter (C) to fuel feed hose (1) in the same
manner as instructed in Step 4.
6.
After connecting fuel hose for fuel pressure check, pull the hose with a force of approximately 98 N (10 kg,
22 lb) to confirm fuel tube does not come off.
7.
Reinstall the part removed at Step 3.
NOTE:
Install the part to allow smooth engine starts.
8.
Turn ignition switch ON and check for fuel leakage.
9.
Start engine and check for fuel leakage.
10. Read the indication of fuel pressure gauge.
CAUTION:
• Do not perform fuel pressure check with system operating. Fuel pressure gauge may indicate
false readings.
• During fuel pressure check, confirm for fuel leakage from fuel connection every 3 minutes.
HIGH FUEL PRESSURE CHECK
NOTE:
Since the fuel pressure gauge kit cannot be connected, follow the method shown below to check high fuel
pressure.
WITH CONSULT-III
1.
Start engine.
2.
Check “FUEL PRES SEN V” in “DATA MONITOR” mode with CONSULT-III.
5 : No.2 spool
Tightening torque
: 1.0 - 1.5 N·m (0.1 - 0.15 kg-m, 9 - 13 in-
lb)
A : Fuel pressure gauge
B : Fuel hose for fuel pressure check
PBIB2983E
JSBIA0491ZZ
At idling
: Approximately 450 kPa (4.5 bar, 4.6 kg/cm
2
,
65 psi)