Nissan PULSAR N13 Series / ASTRA LD Series. Manual - part 24

Fuel and Engine Management

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

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 manual

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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