Land Rover Fuel Injection System Manual

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NINclcROVER
BASE IDLE SPEED SETTING
NOTE: the base idle speed is set at the factory. It
should not require further adjustment unless the
plenum chamber is changed. The adjustment
screwis sealed with a plug to prevent
unauthorised alteration. Check the ignition
timingbeforeattempting
thefollowing
procedure, since this will affect the idle speed.
Equipment required
Two blanking hoses. It is recommended that these
are manufactured using a new air by-pass valve
hose 
- Pari No.ETC7874. Cut two equal pieces
9Omm (3 l/2 inches) long from the hose and seal
one end of each, using 13mm 
(l/2 inch) diameter
bar. A suitable clamp can be used to ensure an air
tight sealChecking procedure
Drive the vehicle for at least two miles until
the engine and transmission are hot. Switch
off the engine.
Check that all electrical loads are off including
air conditioning.
Remove the air by-pass valve hose.Fit the blanking hoses to both the plenum
chamber and the air by-pass valve. Ensure thehoses are securely fitted to prevent air leaks.
Note that the throttle cable and cruise control
actuator have been omitted from the
illustration for clarity.
5. Start the engine and check that the idle speed
is within the limits specified in Section 05 
-
Engine Tuning Data.Adjusting base idle speed
6. Remove the tamper proof plug that protects
the idle speed screw. Drill the plug and insert
a self tapping screw to enable the plug to
extracted.
RR2953E
7.
8.Start the engine, and using a suitable Allen
key,adjust the idle screw clockwise to
decrease or counter-clockwise to increae the
idle speed.Check fault code display, and clear the
memory 
-see ‘Clearing fault code display’ -
section 19, page 74.
76ADDITION: SEPT. 89
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							K”i;;l;i 1990
FUEL INJECTION SYSTEM 119 1
:
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.,. ,.FUEL SYSTEM 1991 MODEL YEAR
..A revised fuel sytem is fitted to 1991 model year
vehicles. The major change is the fitting of a plastic
fuel tank with improved breather system. The
remote expansion tank is now deleted.
A further improvement is the fitting of a combined
fuel pump and sender unit. A panel in the floor of
the vehicle permits access to the fuel pump/sender
unit
FUEL PUMP/SENDER UNIT
WARNING: Ensurethat the Fuel Handling
Precautions given in Section 01 
- Introduction
regarding fuel handling are strictly adhered to
when carrying out the following instructions.
:;. ::‘.‘*‘a’.%’CAUTION: Before disconnecting any part of the
fuel system, it is imperative that all dust, dirt
and debrisis removed from around the
components to prevent ingress of foreign matter
into the fuel system.
Special Tool 
-LST131, wrench - pump retaining
ring
- LST 144 -‘Speedfit’ disconnector
Remove and refit
Removing
1.
2.
3.
4.
5.Depressurise the fuel system.
Disconnect battery negative lead.
Syphon at least 9 litres (2 gallons) of fuel from
the fuel tank using a suitable container that
can be sealed afterwards.
Remove carpet from loadspace floor and
tailgate.Fold back the sound insulation to reveal the
access panel.6. Remove the securing screws and detach the
access panel from the floor.
7. Disconnect the electrical connections at the
multi-plug.
8. Remove the insulation sealant from around the
ground lead, and disconnect the ground lead.
9. Disconnect the two fuel line unions from the
fuel pump.
10. Using Special Tool No. 
LST131, remove pump
assembly retaining ring and withdraw the
pump from the fuel tank.
WARNING: A quantity of fuel will be retained in
the body of the unit, care must be taken to
prevent fuel spillage when the unit is removed.
ADDITION: SEPT. 89
77 
						

							’ FUELINJECTIONSYSTEMRefitting
11.
12.
13.
14.
15.
16.
17.
18.
19.Insert the fuel pump into the tank. Fit the
retaining ring and tighten to a torque of 45-50
Nm (34-37 
Ibf ft).
Connect the fuel lines to the pump.
Connect the electrical leads at the multi-plug.Connect the ground lead to the pump and
insulate with suitable sealant.When the fuel system has been reassembled
check all fuel pipes, sealing rings and hose
connections are secure.Run the engine to check for fuel leaks before
final assembly.Inspect the access panel seal, fit a new seal if
necessary.Fit the access panel and secure to the floor
with the screws.Reverse operations 4 
- 5 to refit the sound
insulation and carpet.
FUEL TANK
WARNING:Ensure that the Fuel Handling
Precautions given in Section 01 
- Introduction
regarding fuel handling are strictly adhered to
when carrying out the following instructions.
CAUTION: Before disconnecting any part of the
fuel system, it is imperative that all dust, dirt
and debris
is removed from around the
components to prevent ingress of foreign matter
into the fuel system.
Remove and refit
Removing
1.
2.Depressurise fuel system. Disconnect batterynegative lead.Syphon the fuel tank into a suitable container
that can be sealed afterwards.ENSURE THAT THE TANK IS DRAINED
COMPLflELY. (refer to Warning concerning
fuel vapor and spillage at start of this
procedure).Remove carpet from loadspace floor and
tailgate.Fold back the sound insulation to reveal the
access panel.Remove the securing screws and detach the
access panel from the floor.Disconnect the electrical connections at the
multi-plug.NOTE: To disconnect the ‘speedfit’ connector,
forked end into the two slots of the connector
as shown in the illustation above. Press down on
the 
collet and simultaneously pull t&e pipe from
the connector. Special tool LST 144 is available
for this operation.
78ADDITION: SEPT. 89
Remove the insulation sealant from around the
ground lead, and disconnect the ground lead.Disconnect the two fuel line unions from the
fuel pump.Working underneath the vehicle, remove the
rear anti-roil bar straps, and allow the bar to
swing down clear of the tank.
1311 16RR2962E
10.
11.
12.Remove the tank filler and vent hoses at the
fuel tank.Remove the nut and bolt securing the right
hand side of the fuel tank strap.Disconnect the 
WdpOratiVe control pipe at the
green end of the ‘speedfit’ connector. 
						

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yo;;; 1990
FUEL INJECTION SYSTEM
13. Remove the back two bolts and nut plates
securing the fuel tank cradle.
14. Remove the front nuts, bolts and washers, and
remove the fuel tank cradle.15. With the aid of an assistant, tilt the right hand
side of the tank upwards and manouver the
tank through the chassis to remove.Refitting
16. Reverse the removal procedure, ensuring thatthe sealing ring, fuel pipe and hose
connections are secure.
17. Run the engine and recheck all connections
to ensure no fuel leaks exist. Reverse the
remaining removal procedure.
FUEL FILTERRemove and refit
WARNING: ENSURE THAT THE FUEL HANDLING
PRECAUTIONS GIVENIN SECTION 01 
-INTRODUCTION REGARDING FUEL HANDLING
ARE STRICTLY ADHERED TO WHEN CARRYING
OUT THE FOLLOWING INSTRUCTIONS.
WARNING:
THESPILLING OFFUEL IS
UNAVOIDABLEDURING THISOPERATION.ENSURE THAT ALL NECESSARY PRECAUTIONS
ARE TAKEN TO PREVENT FIRE AND EXPLOSION.
Removing
1. Depressurise the fuel system.2. The fuel filter is located on the right-hand
chassis side member forward of the fuel tank
filler neck. Access to the filter is gained
through the right-hand rear wheel arch.Clamp the inlet and outlet hoses to prevent
theminimum offuelspillagewhen
disconnecting the hoses.Loosen the two fuel line unions and remove
the hoses from the filter canister.Release the single nut and bolt securing the
filter and clamp and remove the filter.
,--\ 7 “
RR2966ERefitting
6.
7.
8.
9.
10.Fit a new filter observing the direction of flow
arrow on the canister.
Tighten the single nut and bolt.Fit the inlet and outlet hoses. Tighten the
unions to a torque of 
20-25 ft lb(27-34Nm).Refit the fuel pump relay, reconnect the
battery. Recode the radio.Start the engine and inspect for fuel leaks
around the hose connections.ADDITION: SEPT. 89
79 
						

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1191FUEL INJECTION SYSTEM
FUEL FILLER FLAP RELEASE BUTTON
The fuel filler flap is no longer part of the central
locking system on 1991 model year vehicles. The
filler flap is permanently locked. To release the flap
press the button situated on the steering column
shroud. On closing, the filler flap will be locked
automatically. Note that the release button will only
work with ignition switched OFF.
Remove and refit
Removing
1. Disconnect the battery negative lead.
2. Carefully pry the release button from the
steering column shroud.
RR2031M3. Remove the release button from the shroud
and disconnect the two wiring connectors.
Ensure that the wires protrude through the
shroud to facilitate reassembly.
Refitting
4. Reverse the removal procedure. Recode the
radio.FUEL FILLER FLAP RELEASE ACTUATOR
Remove and refit
Removing
1. Ensure that the fuel filler flap is released.
Disconnect the battery negative lead.
2. Remove eight screws, and withdraw the
closure panel, situated in the right hand side
of the load space.
3. Release two screws and maneuver the actuator
clear of its mounting.
4. Disconnect the wiring plug.
5. Withdraw the actuator.
RR2932MRefitting
a0ADDITION: SEPT. 896. Reverse the removal procedure. Recode the
radio.
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