Land Rover Fuel Injection System Manual

							r-t19 FUEL INJECTION SYSTEM-.- - -.wII
MT PROCEDURERESULTS - Check cables and units shown in bold
13.Check air bypass valve - Part IOhm-meter reading of 48-58 Ohms -
Proceed to Test 14
Incorrect reading
Check:-
13
IGNlTtON OFF
RR1828E
ITEST PROCEDURE
14.Check air bypass valve - Part 2
0
-
I3-IGNITION 
OFFRESULTS 
- Check cables and units shown in bold
Ohm-meter reading of 
48-58 Ohms -Proceed to Test 15
I
Incorrect reading
ICheck:-
‘.16Y. .,‘.*::, ‘.REVISED: APR. 88 
						

							.
KHNCIt 1987
ROVERFUEL INJECTION SYSTEM 119 1..1RESULTS 
- Check cables and units shown in bold
Ohm-meter reading of 
5000 Ohms -Proceed to Test 16Incorrect reading of Infinity
Check:-
[EST PROCEDURE
15.Check throttle potentiometer - Part 1
15
u3NIlloN OfT
RA1830E
rEST PROCEDURE
16.Check throttle potentiometer - Part 2RESULTS 
- Check cables and units shown in bold
Correct voltmeter 
readings-
Proceed to Test 17
ThrottleThrottle
closedopen0.29 
)( 4.6 Volts
)smooth (
)__....__...___________(0.36 )swing( 5.0 Volts
Incorrect voltmeter readingsCheck:--I-
CI-
’ I ’IGNITION ON
RRl831E4Continued
REVISED: JUNE 8717
:. 
						

							RANGE
19 FUEL INJECTION SYSTEM“*’ ROVER
‘EST PROCEDURE
17.Check ou~pul ofAirflow sensor
RESULTS . Check cables and units shown in bold
Voltmeter reading of 0.3-0.6 volts-
Proceed to Test 18
Incorrect voltmeter reading
Check:--
IGNITION ONw
PRECAUTION:Depressurize the fuel system when fitting the fuel pressure gauge ordisconnecting/replacing fuel system
components.
CAUTION: Thoroughly clean the immediate area around the fuel filter and hose connections before
disconnecting the fuel feed line from the filter. Failure to do so could cause foreign matter to be
present in the fuel system which would be detrimental to the fuel system components.
WARNING: The spillage of fuel from the fuel filter is unavoidable when disconnecting the fuel feed
line, ensure that all necessary precautions are taken to prevent fire and explosion due to fuel vapour
and fuel seepage.
.
DEPRESSURIZING PROCEDURE.
a)Ignition off, pull pump relay off its terminal block.b)Crank engine for a few seconds - engine may fire and run until fuel pressure is reduced.
clSwitch off the ignition.
d)Connect fuel pressure gauge in the fuel supply line between the fuel rail and the fuel filter, adjacent to
the filter (see Test 18).
e)Reconnect the pump relay.
18REVISED: JUNE 87
1.
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‘..(. ‘.FUEL 
INIECTION SYSTEM 119 1NOTE: Insert the pressure
gauge in the fuel feed line
immediately after the fuel
line filter. The filter is
located beneath the right
hand rear wheel arch attached
to the chassis
(34.0-37.0 p.s.i.)
(6)Pressure drop-max 0.7 kgflcm’(IO p.s.9 in one minute
IGMTION OFF
1R1833EContinued19 
						

							RANGE
FUEL INJECTION SYSTEMlg8’ ROVER
EST PROCEDURERESULTS - Check cables and units shown in bold
9.Check for leaking injectorWARNING: Ensure that allnecessary precautions are takenNOTE: Before removing any
of the injectors, remove and
examine the spark plugs.
check for 
consistenlcolouration of plugs.
A leaking injector will
result in the appropriate
spark plug being ‘sooted up’.IO prevent fire and explosion.
Replace any injector which leaks
more than 2 drops of fuel per minute.
Remove all injectors from
manifold but do not
disconnect from fuel rail
tR1834E
,’ 
						

							I---
;
rot;; 1987
FUEL INJECTION SYSTEM
rEST PROCEDURE
!O.Check for injector operation
Left bank injectors 1,3,5,7
20\
rEST PROCEDURE
11.Right bank injectors 2,4,6,6
IGNITION ONRESULTS 
- Check cables and units shown in bold
WARNING: Ensure that 
allnecessary precautions are takenIO prevent fire and explosion.
Repeat test for other injectors
Replace any injector which does not
operate.
NOTE: Fuel flow is 
167cc minimum
per minute per 
injeclorRESULTS 
- Check cables and units shown in bold
WARNING: Ensure that 
all
necessary precautions are taken
IO prevent fire and explosion
Repeat test for other injectors
Replace any injector which does not
operate
NOTE: Fuel flow is 
167cc minimum per
minute per injector
Continued 
						

							:.
‘.‘.:.
‘: .,:.
‘. .’ ,‘:
RANGEFUEL INJECTIONSYSTEM
lg8’ ROVER
‘EST PROCEDURE
!2.Check gear switch inputRESULTS 
- Check cables and units shown in bold
Voltmeter reading of zero 
volts-Neutral and park
Voltmeter reading of 
4.5-5.0 Volts-R.D.3.2.1 - Proceed to Test 23
Incorrect reading
Check:
1otw10r-d ON
RR1837E22
.
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ro7;; 1987
FUEL INJECTION SYSTEM Ii9 1
‘_’
,,,‘EST PROCEDURE
:3.Check road speed inputRESULTS 
- Check cables and units shown in bold
Voltmeter reading of 0 to 12V fluctuating 6 times per
revolution 
- Proceed to Test 24
NOTE: Raise and rotate the left hand
rear road wheel slowly
Incorrect reading
Check:
IGNITCON ON
RR1838E
rEST PROCEDURE
24.Check Lambda sensor heater coils
NOTE: Remove pump relay from its 
conneclorRESULTS . Check cables and 
unils shown in bold
Ohm-meter reading of 2.65-3.35 Ohms
Incorrect reading
Check:NOTE: A reading of 5.3 lo 6.7 Ohms indicates a faulty
Lambda sensor
24IGNITION OFF
RR1840EAfter completing the tests with either the ‘Diagnostic’ equipment or multi-meter, re-test the vehicle to ensure
the faults have been rectified. If faults still persist, recheck using the Lucas diagnostic equipment.23 
						

							FUEL INJECrlONSYSTEM
ENGINE TUNING PROCEDURE
Before carrying out ‘Engine Tuning’ on fuel injection
vehicles, it is important that all other engine relatedsetting procedures are undertaken first; air flow
sensor to air cleaner correctly fitted, ignition and
throttle potentiometer 
correcty set; all hoses
correctly fitted and secured.
These checks should be carried out with the enginecoolant temperature beween 80” to 95°C (176” to
203°F).CHECK AND ADJUST IGNITION TIMING
1. Check that ignition timing is at 6” 
2 1” BTDC.
2. Timing to be checked when engine speed is
less than 800 
rev/min using a stroboscopic
lamp.3. If adjustment is necessary, loosen the
distributor clamp nut and rotate clockwise to
retard or ‘counter -clockwise to advance. When
the required setting has been attained, tighten
the clamp nut and recheck the setting.NOTE: Timing to be checked with vacuum
hose connected.
IDLE SPEED is preset at the factory and should
not normally require adjustment.
CAUTION:
A. If engine fails to start within a maximum time
of 12 seconds the cause must be rectified.
Following rectification the engine must be runat 1500 rpm (no load) for 3 minutes to clear
any accumulation of fuel in the catalysts.B. 
If the engine is misfiring, it should be
immediatelyshut downand the cause
rectified.Failure to comply with A or B will result in
irreparable damage to the catalysts.
24 
						

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yo;;; 1987
FUEL INJECTION SYSTEM 119 1
.:
AIR CLEANERRemove and Refit
Removing
1.
2.
3.4.
5.
7.
8.
9.
. .
“.Release the two clamps securing the air
cleaner to the airflow sensor.
Release the two nuts and bolts securing the air
cleaner to the left hand valance mounting
bracket.
Detach the airflow sensor from the air cleaner,
and lay carefully to one side.
Detach the air cleaner from the centre
mounting bracket and withdraw from the
engine compartment.
Remove the large 
‘0’ ring from the outlet
tube of the air cleaner, inspect for condition,
fit a new 
‘0’ ring if in poor condition.
Unclip the three catches securing the inlet
tube to the air cleaner canister and remove
the inlet tube.
Remove the nut and end plate securing the air
cleaner element in position.
Withdraw the air cleaner element and discard.
Inspect the dump valve for condition and that
it is clear of obstructions.
.; . .
RFiI854ERefitting
AIR FLOW SENSORRemove and refit
RemovingNOTE: The air flow sensor is not a
serviceable item. In the event of failure or
damage the complete unit is to be replaced.
Disconnect the battery negative terminal.
Release the large hose clamp at the rear of the
air flow meter and disconnect the hose from
the sensor.
Disconnect the multi-plug.
Release the two clips securing the air flow
sensor to the air cleaner case detach the
sensor from the case and withdraw it from the
engine compartment.
Refitting
5. Reverse the removal procedure ensuring that
the multi-plug is firmly reconnected to the air
flow sensor and that the hose clamp at the
rear of the sensor is securely tightened, to
prevent un-metered air entering the engine.
10. Fit a new element and secure in position.
11. Refit the inlet tube to the air cleaner canister.
12. Refit the air cleaner to the mounting bracket
and tighten the two nuts and bolts.
13. Clip the air flow sensor to the air cleaner.
REVISED: SEPT. 8825
.:...