Workshop Manuals Factory service & repair Land Rover
01 Discovery Workshop Manual - 2nd Edition02 01 - INTRODUCTION03 04 - GENERAL SPECIFICATION DATA04 05 - ENGINE TUNING DATA05 07 - GENERAL FITTING REMINDERS06 09 - LUBRICANTS, FLUIDS AND CAPACITIES07 10 - MAINTENANCE08 12 - ENGINE - Tdi09 10 11 12 12 - ENGINE - V8i13 12 - ENGINE - 4.0 V814 12 - ENGINE - Mpi15 16 17 18 17 - EMISSION CONTROL19 19 - FUEL SYSTEM - Tdi20 19 - FUEL SYSTEM - MFI21 19 - FUEL SYSTEM - SFI22 19 - FUEL SYSTEM - Mpi23 19 - FUEL SYSTEM - Cruise Control24 26 - COOLING SYSTEM - Tdi25 26 - COOLING SYSTEM - V8i26 26 - COOLING SYSTEM - Mpi27 28 30 - MANIFOLD AND EXHAUST SYSTEM29 33 - CLUTCH30 37 - MANUAL GEARBOX - R38031 41 - TRANSFER GEARBOX32 44 - AUTOMATIC GEARBOX - ZF33 34 35 47 - PROPELLER SHAFTS36 51 - REAR AXLE AND FINAL DRIVE37 38 54 - FRONT AXLE AND FINAL DRIVE39 40 41 57 - STEERING42 43 44 60 - FRONT SUSPENSION45 64 - REAR SUSPENSION46 70 - BRAKES47 74 - WHEELS AND TYRES48 75 - SUPPLEMENTARY RESTRAINT SYSTEM49 76 - CHASSIS AND BODY50 51 80 - HEATING AND VENTILATION52 82 - AIR CONDITIONING53 84 - WIPERS AND WASHERS54 86 - ELECTRICAL
Land Rover 300Tdi Discovery12 · 12 - ENGINE - V8i
12 · Engine

ENGINE RUNNING PROBLEMS

Make
Land Rover
Model
Discovery 300Tdi Discovery
Section
FAULT DIAGNOSIS › ENGINE RUNNING PROBLEMS
12 - ENGINE - V8iENGINE RUNNING PROBLEMS
background image

V8i

3

FAULT DIAGNOSIS

ENGINE STARTING PROBLEMS

Engine fails to crank in park or neutral (Automatic
Transmission)

1. Is battery in good state of charge?

NO -

See INTRODUCTION, Information,

Jump Starting

YES - Continue.

2. Is automatic transmission inhibitor switch faulty

or gear selection linkage incorrectly adjusted?
YES -

See AUTOMATIC GEARBOX, Repair,

Inhibitor Switch ,

NO -

See Electrical Trouble Shooting

Manual.

If problem is not diagnosed repeat tests, starting
at 1.

Engine fails to crank (Manual Transmission)

1. Is battery in good state of charge?

NO -

See INTRODUCTION, Information,

Jump Starting

YES -

See Electrical Trouble Shooting

Manual.

If problem is not diagnosed repeat tests, starting
at 1.

Engine cranks but fails to start

1. Is the cranking speed fast enough (120 rpm)?

NO -

See INTRODUCTION, Information,

Jump Starting

If necessary also.

See Electrical Trouble

Shooting Manual.
YES - Continue.

2. Is there combustion in any cylinder?

NO -

See ELECTRICAL, Fault diagnosis,

Lucas Constant Energy Ignition
System - V8i See Electrical Trouble
Shooting Manual.

YES - Continue.

3. Are the fuel supply, tank, pump, ventilation and

emission control systems in correct working
order or the fuel contaminated?
NO -

See FUEL SYSTEM, Repair, Fuel

Filter See FUEL SYSTEM, Repair,
Fuel Tank See FUEL SYSTEM, Repair,
Fuel pump and Sender Unit See
EMISSION CONTROL, Description and
operation, Emission control

If problem is not diagnosed repeat tests, starting
at 2.

ENGINE RUNNING PROBLEMS

Engine runs at high speed but will not idle (stops)
Engine idle speed erratic Engine starts but stops
immediately
Engine stalls Engine misfires/hesitation

1. Multiport fuel injection.

See Electrical Trouble

Shooting Manual. See ELECTRICAL, Fault
diagnosis, Lucas Constant Energy Ignition
System - V8i
Check brake vacuum connections.

See

BRAKES, Description and operation, Brake
Servo Unit
Check heater/ventilation unit vacuum
connections.

See HEATING AND

VENTILATION, Description and operation,
Heating and Ventilation Unit
If problem is not diagnosed continue.

2. Are HT leads correctly routed and clipped?

NO -

See ELECTRICAL, Repair, Distributor

- V8i

YES - Continue.

3. Is fuel supply, tank, pump, ventilation and

emission control systems in correct working
order or the fuel contaminated?
NO -

See FUEL SYSTEM, Repair, Fuel

Filter See FUEL SYSTEM, Repair,
Fuel Tank See FUEL SYSTEM, Repair,
Fuel Pump and Sender Unit See
EMISSION CONTROL, Description and
operation, Emission Control

If problem is not diagnosed repeat tests, starting
at 1.

Engine lacks power/poor performance

1. Is throttle travel restricted or cable incorrectly

adjusted?
YES - Check thickness of carpets.

See FUEL

SYSTEM, Repair, Throttle Cable See
FUEL SYSTEM, Repair, Accelerator
Pedal

NO -

Continue.

2. Are the Ignition and Multiport Fuel Injection

systems in order?
NO -

See Electrical Trouble Shooting

Manual.A1 See ELECTRICAL, Fault
diagnosis, Lucas Constant Energy
Ignition System - V8i See
ELECTRICAL, Repair, Distributor - V8i

YES - Continue.

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