SAFARI

4 DLT ENGINE

Overracing / Autoracing of engine / vehicle

Delayedresponse

Difficult Starting (Cold / Hot)

Irregular Idle and Fast Idle

Insufficient MaximumSpeed

Erratic Running / Surging

Excessive Smoke

Excessive Noise

Lack of Power

Excessive Fuel

Consumption

Stalling

Slow Engine Die-down

EnginecannotbeShut-off

Cause

Check

1. Lack of Fuel

1 Fuel Level

2. Manual stop control* faulty

In run position and linkage free

3. Stopsolenoid* faulty

Audible operation when switched. Check electrical supply.

4. Stop solenoid* valve leaking

Engine stops when supply lead removed.

5. Wrong starting procedure

Starting procedure correct. (Start advance and starting aid operation).

6. Air in fuel system

Fuel System is vented, all joints and unions airtight, no leakage at diaphragms

7. Fuel inter restriction

Filter not choked and feed pipes clear

8. Fuel contamination

Diesel fuel being used, not petrol; free of water, dirt, ice and wax

9. Low viscosity / low density fuel

Check for origin of fuel

10. Low cranking speed

10. Battery, Starter, Cable Connections, Correct engine lubricating oil

11. Starting aid* ineffective (Plugs or Thermostart) 11. Correct functioning. Fuel supply* timer* and electrical connections

12. Injection timing incorrect

12. Pump to engine timing

13. Timing belt* slipped several teeth

13. Belt / Chain condition and tension

14. Feed pump* faulty

14. Feed Pump Pressure

15. Fuel return restricted

15. Rotary pump backleak, tank returns, filter vents are clear

16. Fuel circuit incorrect

16. Inlet and backleak pipes correct way round. Banjo bolts of correct Lucas-TVS type

17. Enginecondition

17. Cylinder compression. Valve timing and clearances. Air filter not choked, Injector seating

18. Exhaust system defective

18. SystemUnrestricted

19. Fuel atomisation

19. Injectors : correct type, opening pressure, spray conditions, evenly tightened

20. Fuel tank blockage

20. Tank vent and outlet filter unrestricted

21. HP Pipe type / firing order incorrect

21. HP Pipes type and fitted in correct firing order

22. HP Pipe restriction

22. HP Pipes not linked or bore reduced at nipples

23. HP vent* leaking

23. Vent screw tight

24. HP Pipe leaking

24. HP Pipe joint tightness

25. LPLeakage

25. Feed and return pipe, filter, feed pump and tank for leakage

26. Idling speed incorrect

26. Idlingspeed

27. Anti-stall* setting incorrect / high

27. Recovery from acceleration, engine warm (if necessary, reset idling and anti-stall)

28. Maximum speed setting incorrect

28. Engine fly-off (maximum.) speed

29. Throttle lever not returning to min position 29. Check for stickiness of throttle lever / PLLA lever

30. Accelerator linkage faulty

30. Throttle lever tight on pump and reaches stop screws. Linkage wear, adjustment, freemovement

31. EngineVibration

31. Enginemountings tightandeffective

32. Vibration

32. Vibrations transmitted to engine (e.g. from gear box)

33. Overloading

33. Vehiclepayload

34. Vehicle brakes binding

34. Brake freedomwheel by wheel, handbrake off

35. Injection pumpmountings loose

35. Tightness of pump drivemounting bolts.

36. Injectionpumpdefective

36. If all other relevant checks are satisfactory, remove pump for specialist check at Delphi-TVS

* If fitted

Authorised Centre

FAULT DIAGNOSIS FUEL INJECTION SYSTEM

Symptom

l l l l l

l l l l

l l l l l

l l

l l l l l l

l l l

l l l l

l l l l l l l l l

l l

l l l l l

l l

l l l l l l l

l l

l l l

l l

l l l

l l

l l l

l l

l l l l l l l l l l l