Land Rover Defender Workshop Rover Manual

19FUEL
SYSTEM
6 DESCRIPTION
ANDOPERATION
TWIN TANK FUELCHANGE -OVER MECHANISM
1. Change-over tap,fueltanks
2. Fuel supply, sidetank
3. Fuel supply, reartank
4. To fuel liftpump
5. Change-over tap,spill return
6. Spill return, sidetank
7. Spill return, reartank 8.
Spill return, injection pumptochange-over tap
9. Control rod,operating levertofuel change-over
tap
10. Control rod,change-over levertospill return
pivot bracket
11. Fuel tankchange-over switch
12. Control lever  

FUELSYSTEM
7
DESCRIPTION
ANDOPERATION
FUEL SYSTEM COMPONENT LOCATION
1. Fuel filterbleed screw
2. Fuel filter
3. Turbocharger
4. Actuator
5. Air cleaner
6. Fuel injector 7.
Heater plug
8. Heater plugcontroller
9. Coolant temperature transmitter
10. Fuel injection pump
11. Fuel liftpump
12. Intercooler   

19FUEL
SYSTEM
8 DESCRIPTION
ANDOPERATION
EGR FUEL SYSTEM COMPONENT LOCATION,(whenfitted)
1. EGR modulator valve
2. Electrical harnessplug
3. Vacuum spillpipe, modulator toair cleaner hose
4. Vacuum pipe,brake servohosetomodulator
valve
5. Tpiece connector
6. Vacuum pipe,vacuum pumptobrake servo 7.
EGR valve
8. Vacuum pipe,modulator valvetoEGR valve
9. Multi-plug connector, EGRvalve
10. EGR control unit(fixed onbase ofcentre seator
cubby box)
11. EGR throttle position sensor  

FUELSYSTEM
9
DESCRIPTION
ANDOPERATION
OPERATION Diesel
engines operatebycompression ignition.The
rapid compression ofair inthe cylinder duringthe
compression cycleheats theairand when fuelis
injected intotheheated air,itignites instantaneously.
During coldtarting, automatically controlledheater
plugs assist inraising thetemperature ofthe
compressed airtoignition point.
A cold start advance unitadvances theinjection timing
to further assiststarting. Idlequality isimproved by
the high idlesetting.
The...

19FUEL
SYSTEM
10 DESCRIPTION
ANDOPERATION
Under
varying enginespeedandload condition the
control unitsends asignal toopen thevacuum
modulator whichallows avacuum tobe applied above
the EGR diaphragm. Thevacuum supplyistaken from
a T connector inthe brake servohose.Thisprocess
is controlled byan engine speed/load mapstored in
the EGR control unitmemory.
Engine speedismeasured bymonitoring the
waveform presentonone phase ofthe generator.
Throttle position ismeasured viaasensor mounted on
the fuel injection...

FUELSYSTEM
1
ADJUSTMENT
THROTTLE
CABLE
Adjust
1. Slacken throttlecableadjustment ferrule.
2. Hold throttle leverinfully closed position.
3. Adjust outercable, byrotating ferrule,togive
1,57 mm(1/16 in)ofdeflection inthe inner cable.
4. Check thatthrottle opensfullywhen thethrottle
is depressed. EGR
THROTTLE POSITIONSENSOR
Check 1. Run engine untilnormal operating temperature is
reached.
2. Switch offengine anddisconnect throttleposition
sensor multi-plug.
3. Connect anOhmmeter acrosspins1and 3of...

19FUEL
SYSTEM
2 ADJUSTMENT
LOW
ANDHIGH IDLESPEED ADJUSTMENT
NOTE:Thehigh idlespeed (coldstartidle)
is automatically setbythe setting ofthe
low idle speed andcannot beadjusted
individually.
1. Check andadjust throttle cable.
SeeThrottle
cable
2. Start engine andrunituntil normal operating
temperature isreached.
3. Using asuitable tachometer, checktheengine
idle speed,
See ENGINE TUNINGDATA,
Information, 300Tdi
4.Ifadjustment isnecessary, firstslacken the
locknut oninjection pump.
5. Turn adjustment...

FUELSYSTEM
3
ADJUSTMENT
INJECTION
PUMPTIMING -CHECK ANDADJUST
Service repairno-19.30.01
1. Viewing thevalve mechanism throughoilfiller
aperture, turncrankshaft clockwiseuntilinlet
valve ofNo.1 cylinder hasjustclosed. No.1
cylinder isnow justbefore TDC.
2.Remove blankingplugfrom flywheel housing
and insert timing toolLRT-12-044 ,locating
centre pinonflywheel.
NOTE: Achassis undertray maybefitted
on some vehicle derivatives toconform to
legal requirements. Whenunder chassis
adjustments orremove andrefit...

19FUEL
SYSTEM
4 ADJUSTMENT
TURBOCHARGER
BOOSTPRESSURE -CHECK
Service repairno-19.42.06
1. Disconnect actuatorhosefromturbocharger and
insert asuitable Tpiece connector.
2. Connect ashort length ofsuitable hoseto
turbocharger andTpiece.
3. Connect furtherhosetoT piece andpressure
gauge LRT-12-011 .The pressure gaugehose
must belong enough toreach intothevehicle
cab sothat thegauge canbeobserved bydriver
or passenger.
4. To check maximum boostpressure, drive
vehicle normally, butinsuch amanner thatfull...

FUELSYSTEM
5
ADJUSTMENT
Fuel
injection pump
If the fuel injection pumphasbeen removed or
renewed carryoutthefollowing:
1. Slacken fuelinlet pipe banjo boltatinjection
pump.
2. Operate handpriming leveronfuel liftpump until
fuel, freefrom air,emerges frominjection pump.
3.Tighten banjoboltwhilst fuelisstill emerging.
4. Crank engine untilfuelisdrawn through the
system andengine starts.
5. Check fuelconnections forleaks.