Nissan PULSAR N13 Series / ASTRA LD Series. Instruction — part 24
Fuel and Engine Management
97
circuitry do not immerse it in cleaning
solvent as this may result in irreparable
damage.
Installation is a reversal of the removal procedure
with attention to the following points:
(1) Lubricate the new O ring seals with auto-
matic transmission fluid prior to installing them to the
injector. If removed, ensure that the lower filter screen
is installed.
(2) Firmly push the injector into the throttle
body assembly until it is fully seated, ensuring that the
injector connection terminals face towards the rear of
the vehicle.
(3) Apply Loctite 262 to the injector retaining
plate screw and tighten securely.
(4) Start the engine and check for fuel leaks as
previously described.
(5) Install the air cleaner and tighten the retain-
ing nuts securely.
FUEL METER ASSEMBLY - 1.6 LITRE
ENGINE
To Remove and Install
(1) Remove the injector as previously described.
(2) Mark the fuel supply and return hoses,
release the clamps and disconnect the hoses from the
fuel meter assembly.
(3) Remove the air cleaner assembly base gasket
from the fuel meter assembly.
(4) Remove the bolts and screws securing the
fuel meter assembly to the throttle body and remove
the fuel meter assembly. Remove and discard the
gasket.
(5) If necessary, remove the fuel pressure regu-
lator as previously described.
Installation is a reversal to the removal procedure
with attention to the following points;
(1) If removed, install the fuel pressure
regulator
as previously described.
(2) Place a new gasket on the throttle body,
aligning the holes in the gasket with those in the
throttle body, ensuring that the idle air passage is not
blocked.
(3) Coat the fuel meter assembly retaining
screws with Loctite 262 and tighten securely.
(4) Install the fuel meter assembly retaining bolts
and tighten to the specified torque.
(5) Connect the fuel supply and return hoses and
tighten the clamps securely.
(6) Install the injector as previously described.
(7) Start the engine and check for fuel leaks.
Rectify as necessary.
(8) Install the air cleaner assembly.
FUEL TANK
To Remove and Install
(1) Depressurize the fuel system as previously
described.
(2) Disconnect the negative battery terminal.
(3) Remove the fuel pump cover plate retaining
screws, disconnect the wiring harness rubber grommet
from the cover plate and remove the cover plate from
the wiring harness.
(4) Raise the rear of the vehicle and support it
on chassis stands. Refer to the Wheels and Tires
section if necessary.
(5) Remove the fuel tank drain plug and drain
the fuel into a petroleum resistant container.
(6) Mark the fuel hoses and disconnect the hoses
from the fuel pump.
(7) Disconnect the hoses from the fuel filler neck
pipe, the fuel check valve and the fuel tank breather
pipe.
View of the fuel meter assembly removed from the
throttle body.
HANDBRAKE CABLE MOUNTING
Installed view of the fuel tank.
Fuel and Engine Management
(8) Remove the bolts retaining the intermediate
exhaust pipe to the rear of the catalytic converter,
remove the bolt securing the exhaust mounting to the
underbody and slightly lower the intermediate exhaust
pipe. Support the intermediate pipe to prevent the
tailpipe fouling the lower bumper panel.
(9) Remove the bolts retaining the stabilizer bar
mounting brackets to the underbody and allow the
stabilizer bar to drop.
(10) Remove the bolts retaining the exhaust heat
shield to the underbody, located at the front of the
fuel tank.
(11) Remove the handbrake cable mounting
bracket retaining nuts and remove the mounting
brackets from the mounting studs.
(12) Remove the fuel tank retaining bolts and
maneuver the fuel tank from the vehicle.
Installation is a reversal of the removal procedure
with attention to the following points:
(1) When installing the fuel tank, ensure that the
fuel pump wiring harness is directed through the
aperture in the floor.
(2) Install the stabilizer bar mounting
bracket
bolts and tighten to the specified torque. Refer to the
Rear Suspension section.
(3) Using a new gasket, install the intermediate
exhaust pipe to the catalytic converter ensuring that
the earth wire terminal is installed and tighten the
bolts securely.
(4) Connect the fuel filler neck hose, the fuel
check valve hose and the breather hose ensuring that
they are secured firmly.
(5) Tighten the fuel tank drain plug to the
specified torque.
(6) Connect the fuel hoses to the fuel pump,
using the marks made during removal to ensure
correct installation.
(7) Install the fuel pump wiring harness and the
rubber grommet to the fuel pump cover plate. Install
the cover plate and tighten the retaining bolts se-
curely.
(8) Connect the fuel pump wiring connector
securely.
(9) Check for fuel leaks as previously described.
6. AIR FLOW COMPONENTS
NOTE: Before proceeding with any of the
operations in this section, refer to the Ser-
vice Precautions and Procedures heading.
AIR CLEANER ASSEMBLY
To Renew Element
The procedure for renewing the air cleaner ele-
ment is covered in the Engine Tune-up section.
To Remove and Install — 1.8 Liter Engine
(1) Disconnect the negative battery terminal.
(2) Release the air intake hose retaining clamps,
disconnect the hose from the air cleaner upper
housing and the throttle body and remove the hose.
(3) Remove the screw securing the air cleaner
intake duct to the front panel mounting bracket.
(4) Remove the hexagon head screws retaining
the air cleaner mounting bracket to the right hand
inner mudguard and remove the air cleaner from the
engine compartment.
(5) Release the upper housing retaining clips,
separate the upper housing from the lower housing
and remove the element.
(6) Remove the air cleaner intake duct retaining
screw and disconnect the duct from the lower air
cleaner housing.
(7) If necessary, remove the bolts securing the
mounting bracket to the air cleaner lower housing and
separate the mounting bracket from the housing.
(8) Thoroughly clean the upper and lower hous-
ings in cleaning solvent and check for cracks, splits or
damage that would allow unfiltered air to enter the
engine. Renew any components as necessary.
Installation is a reversal of the removal procedure
with attention to the following points:
(1) Ensure that the rubber insulators are in-
Dismantled view of the air cleaner assembly. 1.8 liter
engine.
Fuel and Engine Management
99
stalled on each side of the air cleaner mounting
bracket when installing the mounting bolts.
(2) If renewing the element, ensure that the
specified element is installed and is correctly seated in
the air cleaner housing.
(3) Ensure that the air intake hose clamps are
tightened securely.
To Remove and Install — 1.6 Liter Engine
(1) Disconnect the negative battery terminal.
(2) Remove the nuts and washers retaining the
air cleaner to the throttle body assembly.
(3) Release the top cover retaining clips and
remove the top cover and the air cleaner element.
Remove the air cleaner retainer from the throttle body
bolts.
(4) Disconnect the engine vent hose from the air
cleaner support clamp.
(5) Slightly raise the air cleaner and tilt it
towards the windscreen. Disconnect the engine vent
hose and the temperature sensor vacuum hose from
the underside of the air cleaner.
(6) Remove the air cleaner housing from the
engine.
Dismantled view of the air cleaner.
(7) Thoroughly clean the air cleaner housing and
top cover and check for cracks or damage that would
allow unfiltered air to enter the engine. Renew any
components as necessary.
Installation is a reversal of the removal procedure
with attention to the following points:
(1) Inspect the air cleaner base gasket. Renew if
necessary.
(2) Connect the engine vent hose and the tem-
perature sensor vacuum hose.
(3) Install the air cleaner ensuring that the hot air
inlet tube is located correctly between the exhaust heat
shield and the air cleaner housing.
(4) When installing the top cover retaining nuts,
hand tighten only.
THROTTLE BODY ASSEMBLY
To Remove and Install — 1.8 Liter Engine
(1) Disconnect the negative battery terminal.
(2) Release the air intake hose clamp and dis-
connect the air intake hose from the throttle body.
(3) Unclip the actuating rod from the throttle
lever using a small screwdriver under the ball socket if
necessary.
(4) Mark the throttle body vacuum hoses with
quick drying paint or similar and disconnect the hoses
from the throttle body. Disconnect the engine vent
hose from the throttle body.
(5) Disconnect the wiring connectors from the
throttle position sensor and the IAC valve.
(6) Remove the retaining nuts and withdraw the
throttle body and gasket.
View of the throttle body and actuating rod. The rod
length must be set so that dimension A - 8—9 mm for
automatic transaxle models and 3—4 mm for instruction
transaxle models.
View of the throttle body and associated components
.
100
Fuel and Engine Management
Installation is a reversal of the removal procedure
with attention to the following points:
(1) Ensure that all throttle body passages are
clean. Blow out with compressed air if necessary.
(2) Install the throttle body to the inlet
manifold
using a new gasket and tighten the retaining nuts to
the specified torque.
(3) Connect the vacuum hoses to the throttle
body in the positions previously marked.
(4) Clip the actuating rod to the throttle body
lever. Check the dimensions shown in the illustration
and adjust the rod length if necessary.
(5) Check the adjustment of the throttle cable as
described later in this section.
(6) Connect the air intake hose and tighten the
hose clamps securely.
To Remove and Install — 1.6 Liter Engine
(1) Depressurize the fuel system as previously
described.
(2) Disconnect the negative battery terminal.
(3) Remove the air cleaner assembly and base
gasket as previously described.
(4) Mark the fuel supply and return hoses,
release the clamps and disconnect the hoses from the
throttle body assembly.
(5) Disconnect the injector, throttle position
sensor and the IAC valve wiring connectors. Remove
the injector wiring harness from the throttle body
assembly and place it to one side.
(6) Mark and disconnect the vacuum hoses from
the throttle body assembly.
(7) On automatic transaxle models, disconnect
the kickdown actuating rod from the throttle linkage.
(8) Slide the outer throttle cable from the
mounting bracket, rotate the throttle linkage and
disconnect the inner throttle cable from the throttle
linkage.
(9) Remove the bolts retaining the throttle body
assembly to the inlet manifold and remove the
assembly and the gasket from the engine.
(10) If necessary remove the retaining screws and
remove the fuel meter assembly, the IAC valve and
the throttle position sensor from the throttle body
assembly.
Installation is a reversal of the removal procedure
with attention to the following points:
(1) If removed, install the fuel meter assembly,
the throttle position sensor and the IAC valve as
described under the relevant headings.
(2) Install the throttle body assembly to the inlet
manifold using a new gasket and tighten the retaining
bolts to the specified torque.
(3) Connect the vacuum hoses to the throttle
body using the marks made on removal to ensure
correct installation.
(4) On automatic transaxle models, connect the
kickdown actuating rod to the throttle linkage.
(5) Install the throttle cable and check the adjust-
ment as described later in this section.
INLET MANIFOLD
To Remove and Install
To remove and install the inlet manifold, refer to
the relevant heading in the Engine section.
IDLE AIR CONTROL (IAC) VALVE
To Test
(1) Connect an accurate tachometer to the en-
gine.
(2) With the engine at normal operating temper-
ature and all accessories switched Off, note the idle
speed.
(3) With the ignition switched Off, disconnect
the IAC valve wiring connector.
(4) Start the engine and check the idle speed.
If the idle speed is the same as that noted in
operation (2) proceed to operation (7).
If the idle speed is higher than noted in operation
(2) proceed as follows.
(5) With the ignition switched Off, connect the
IAC valve wiring connector.
(6) Start the engine and check the idle speed.
If the idle speed is not the same as that noted in
operation (2) proceed to operation (7).
If the idle speed is the same as noted in operation
(2) the IAC valve is operating correctly. However, if
the engine is not idling correctly carry out the
following checks.
(a) Check the air inlet system for vacuum leaks.
NOTE: Any vacuum leak will cause a fast
idle.
View of the throttle body assembly showing the loca-
tion of the base idle adjusting screw. 1.8 liter engine.
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