85 4 DLT ENGINE Overracing / Autoracing of engine / vehicle Delayed response 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 Engine cannot beShut-off Cause Check 1. Lack of Fuel 1 Fuel Level 2. Manual stop control* faulty 2. In run position and linkage free 3. Stop solenoid* faulty 3. Audible operation when switched. Check electrical supply. 4. Stop solenoid* valve leaking 4. Engine stops when supply lead removed. 5. Wrong starting procedure 5. Starting procedure correct. (Start advance and starting aid operation). 6. Air in fuel system 6. Fuel System is vented, all joints and unions airtight, no leakage at diaphragms 7. Fuel inter restriction 7. Filter not choked and feed pipes clear 8. Fuel contamination 8. Diesel fuel being used, not petrol; free of water, dirt, ice and wax 9. Low viscosity / low density fuel 9. 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. Engine condition 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. Idling speed 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. Engine Vibration 31. Enginemountings tight and effective 32. Vibration 32. Vibrations transmitted to engine (e.g. from gear box) 33. Overloading 33. Vehicle payload 34. Vehicle brakes binding 34. Brake freedomwheel by wheel, handbrake off 35. Injection pumpmountings loose 35. Tightness of pump drivemounting bolts. 36. Injection pump defective 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 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
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