Land Rover Defender Workshop 1993 Rover Manual

FUEL SYSTEM 
MULTI PORT FUEL INJECTION  (MFI) CIRCUIT DIAGRAM ST3358M 
EF1  Idle air control  valve  (IACV)  EF15 Tune resistor  connector 
EF2 
EF3  Engine coolant  temperature sensor  (ECTS)  EF17  Fuel injectors 
EF4  Engine  fuel  temperature  sensor (EFTS)  EF18 Fan control  timer 
EF5  Throttle position  sensor (TPS)  EF19  Resistor (manual transmission) 
EF6  Main relay  module  EF20 Onboard  diagnostic  module 
(OBDM) 
EF7 Canister  purge valve  (CANPV)  EM1 Service  reminder  indicator unit 
EF8...

FUEL SYSTEM 
BASE IDLE SPEED  SETTlNG 
NOTE: 
Base  idle speed  is set  at factory. It should 
not  require  further adjustment  unless plenum 
Adjusting  base idle speed 
chamber  is changed.  The adjustment  screw is 
sealed  with 
a plug to prevent  unauthorised 6. Drill tamper  proof  plug and insert  a self 
alteration.  Check ignition  timing before  tapping screw  to  enable plug 
to be extracted. 
attempting  following procedure,  since this will 
affect  idle speed. 
Equipment  required 
Two...

FUEL SYSTEM 
FUEL PRESSURE CHECK 1. Remove fuel pump  relay  module, see Fuel 
injection  relays. 
In  order 
to check  the  fuel pressure  it is  necessary  to 2. Start and run engine. 
first  depressurise  the fuel  system  as follows: 
3. When  sufficient  fuel  has  been  used to cause 
fuel  line pressure 
to drop,  injectors will 
WARNING:  Under normal  operating  conditions  become inoperative,  resulting  in engine  stall. 
the  fuel  injection  system is pressurised  by a high 
pressure 
fuel...

FUEL SYSTEM 
REMOVING AIR CLEANER 
To  Remove  To Remove 
REMOVING 
MASS AIR FLOW  SENSOR 
1. Release two clips securing  air  cleaner to NOTE: The air flow  sensor  is not  a serviceable 
item.  In event  of failure  or damage  complete  unit 
2.  Release  two nuts  and bolts  securing  air must be replaced. 
3. Detach  mass airflow  sensor from air cleaner, 1. Disconnect battery  ground terminal . 
4. Detach  air cleaner  from centre  mounting  sensor. 
mass 
airflow  sensor. 
cleaner 
to left  hand...

FUEL SYSTEM 
REMOVING THROTTLE POSITION SENSOR 
To Remove  To Remove 
REMOVING 
IDLE 
AIR CONTROL VALVE 
1. Disconnect  battery ground  terminal. 1. Disconnect  battery ground  terminal. 
2. Disconnect  electrical plug. 2. Remove multi-plug. 
3. Remove two screws securing  throttle position 3. Unscrew  idle air control  valve from rear 
sensor  to plenum  chamber  and carefully  pull  plenum chamber. 
throttle  position  sensor 
off throttle shaft. 4. Remove  washer. 
4. Remove old gasket. 
To  Refit 
5....

FUEL SYSTEM 
REMOVING VEHICLE SPEED SENSOR  REMOVING 
FUEL INJECTION-RELAY  MODULES 
To  Remove 
Incorporated  in fuel  injection  electrical  system  are 
two relays  modules and a diagnostic  plug.  Access to 
the modules  and  plug  is gained  by removing  the toe 
board  from the  front  passenger’s  footwell.  For  exact 
location,  refer 
to illustration  ST 3362M in Electrical 
1. Place  vehicle  on ramp,  apply parking  brake. 
2. Disconnect battery ground  terminal . 
3. Raise ramp,  disconnect...

FUEL SYSTEM 
REMOVING INERTIA FUEL  SHUT-OFF SWITCH  REMOVING  ENGINE  COOLANT  TEMPERATURE 
The  inertia  fuel shut 
off switch  is located 
adjacent  to the  auxiliary  fuse  panel. Access 
is 
gained by  removing the fuse  panel  cover. 
To  Remove  multi
-plug. 
SENSOR 
To  Remove 
1. Disconnect  engine coolant temperature  sensor 
1. Disconnect battery ground terminal . 2. Release  radiator  bottom  hose, partially  drain 
2. Remove two screws  securing  inertia  fuel  cooling  system. 
3. Withdraw...

FUEL SYSTEM 
DEPRESSURISING FUEL SYSTEM 
WARNING: 
Under  normal  operating  conditions To Remove 
the  fuel  injection  system is pressurised  by a high 
pressure  fuel pump,  operating 
at up to 2.3 to 2.5 
bar  When engine is stationary  pressure is 2. Disconnect battery ground terminal. 
maintained  within system.  To prevent 
3. Release hose  clamp securing  fuel  return hose 
pressurised  fuel escaping  and to avoid  personal 
to fuel  pressure regulator.  Remove the hose. 
injury  it is  necessary...

FUEL SYSTEM 
REMOVING FUEL RAIL-INJECTORS R/H  AND L/H 
To Remove 
11.  Remove  fuel pressure regulator if required. 
1. Depressurise fuel  system. 
2. Disconnect battery ground terminal. 
3.  Remove plenum  chamber. 
4.  Remove  ram housing. 
NOTE: Place cloth over  ram  tube  openings  to 
prevent  ingress of 
dirt. 
5. Release  hose clamp  and  remove  fuel return 
hose from  fuel  pressure regulator. 
6. Disconnect  multi-plug from  engine  fuel 
temperature  sensor. 
7. Disconnect multi-plugs from...

FUEL SYSTEM 
REMOVING PLENUM CHAMBER 
Includes throttle levers and  throttle disc 
To Remove 
1.  Disconnect battery ground terminal. 
2.  Disconnect  electrical  multi
-plug from  idle air 
control  valve. 
3. Disconnect  vacuum  hose adjacent to idle air 
control  valve. 
4. Mark an identification  line on throttle  cable 
outer  to  assist  re
-assembly. 
5. Remove clevis pin  from throttle  cable. 
6.  Pry  adjustment  thumb  wheel  from  throttle 
bracket.  Lay cable  aside. 
7. Remove  retaining...