Nissan Primera P11. Manual — part 118
Fuel Pressure Release
NCEC0024
Before disconnecting fuel line, release fuel pressure from fuel
line to eliminate danger.
WITH CONSULT-II
NCEC0024S01
1.
Start engine.
2.
Perform “FUEL PRES RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3.
After engine stalls, crank it two or three times to release all fuel
pressure.
4.
Turn ignition switch OFF.
WITHOUT CONSULT-II
NCEC0024S02
1.
Remove fuse for fuel pump. Refer to fuse block cover for fuse
location.
2.
Start engine.
3.
After engine stalls, crank it two or three times to release all fuel
pressure.
4.
Turn ignition switch OFF and reconnect fuel pump fuse.
Fuel Pressure Check
NCEC0025
I
When reconnecting fuel line, always use new clamps.
I
Make sure that clamp screw does not contact adjacent
parts.
I
Use a torque driver to tighten clamps.
I
Use Pressure Gauge to check fuel pressure.
I
Do not perform fuel pressure check with system operat-
ing. Fuel pressure gauge may indicate false readings.
1.
Release fuel pressure to zero.
2.
Disconnect fuel hose between fuel filter and fuel tube (engine
side).
3.
Install pressure gauge between fuel filter and fuel tube.
4.
Start engine and check for fuel leakage.
5.
Read the indication of fuel pressure gauge.
At idle speed:
With vacuum hose connected
Approximately 235 kPa (2.35 bar, 2.4 kg/cm
2
, 34
psi)
With vacuum hose disconnected
Approximately 294 kPa (2.94 bar, 3.0 kg/cm
2
, 43
psi)
PEF823K
SEF922W
SEF925W
BASIC SERVICE PROCEDURE
QG16
I
18DE
Fuel Pressure Release
EC-29
If results are unsatisfactory, perform Fuel Pressure Regulator
Check, EC-QG-30.
Fuel Pressure Regulator Check
NCEC0026
1.
Stop engine and disconnect fuel pressure regulator vacuum
hose from intake manifold.
2.
Plug intake manifold with a rubber cap.
3.
Connect variable vacuum source to fuel pressure regulator.
4.
Start engine and read indication of fuel pressure gauge as
vacuum is changed.
Fuel pressure should decrease as vacuum increases. If results
are unsatisfactory, replace fuel pressure regulator.
Injector
REMOVAL AND INSTALLATION
NCEC0027
1.
Release fuel pressure to zero.
2.
Remove fuel tube assemblies in numerical sequence as
shown in the Figure at left.
3.
Expand and remove clips securing fuel injectors.
4.
Extract fuel injectors straight from fuel tubes.
I
Be careful not to damage injector nozzles during removal.
I
Do not bump or drop fuel injectors.
I
Do not disassemble or adjust fuel injectors.
5.
Install fuel injectors.
Carefully install O-rings, including the one used with the pres-
sure regulator.
I
Use bare hands to install O-rings. Do not wear gloves.
I
Apply a coat of engine oil (with a low viscosity of 5W-30,
etc.) to O-rings before installation.
I
Do not use solvent to clean O-rings and other parts.
I
Make sure that O-rings and other parts are clean and free
from foreign particles.
I
Be careful not to damage O-rings with service tools or
finger nails. Do not expand or twist O-rings. If stretched,
do not insert them into fuel tubes immediately after
stretching.
I
Always insert O-rings straight into fuel tubes. Do not tilt
or rotate them during installation.
6.
Position clips in grooves on fuel injectors.
I
Make sure that protrusions of fuel injectors are aligned
with cutouts of clips after installation.
SEF718B
SEF926W
SEF927W
BASIC SERVICE PROCEDURE
QG16
I
18DE
Fuel Pressure Regulator Check
EC-30
7.
Align protrusions of fuel tubes with those of fuel injectors.
Insert fuel injectors straight into fuel tubes.
8.
After properly inserting fuel injectors, check to make sure that
fuel tube protrusions are engaged with those of fuel injectors,
and that flanges of fuel tubes are engaged with clips.
I
Discard old clips; replace with new ones.
9.
Tighten fuel tube assembly mounting nuts in numerical
sequence (indicated in the Figure at left) and in two stages.
: Tightening torque N
⋅
m (kg-m, ft-lb)
1st stage:
12 - 13 (1.2 - 1.4, 9 - 10)
2nd stage:
17 - 23 (1.7 - 2.4, 13 - 17)
10. Insert fuel hoses into fuel tubes so that ends of fuel hoses butt
up against fuel tubes; fasten with clamps, avoiding bulges.
CAUTION:
After properly connecting fuel tube assembly to injector and
fuel hose, check connection for fuel leakage.
SEF928W
SEF929W
BASIC SERVICE PROCEDURE
QG16
I
18DE
Injector (Cont’d)
EC-31
Idle Speed/Ignition Timing/Idle Mixture Ratio
Adjustment
NCEC0028
DIRECT IGNITION SYSTEM — HOW TO CHECK IDLE
SPEED AND IGNITION TIMING
NCEC0028S03
Idle Speed
NCEC0028S0301
I
Using CONSULT-II
Check idle speed in “DATA MONITOR” mode with CONSULT-
II.
Ignition Timing
NCEC0028S0302
Any of following two methods may be used.
I
Method A
a)
Attach timing light to loop wire as shown.
b)
Check ignition timing.
I
Method B
a)
Remove No. 1 ignition coil.
b)
Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to
this wire.
c)
Check ignition timing.
NEF059A
SEF931W
SEF933W
SEF284G
BASIC SERVICE PROCEDURE
QG16
I
18DE
Idle Speed/Ignition Timing/Idle Mixture Ratio Adjustment
EC-32
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