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SPARK PLUG WORKING AND TYPES

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Engine Tuning in briefly

 

Engine Tuning

Engine tuning is more frequently required in modern high compression engine which are more sensitive to variation from specifications than the earlier slow speed low output engines. To maintain an engine at peak performance and economy it must be kept in good condition with all components upto specifications. Often during the engine tuning several conditions will be found which must be corrected to restore the engine to like new condition



TUNING PROCEDURE

A typical tuning or tune up procedure is given below, which includes visual and mechanical check and also check with instruments. Some of the checks are not related to the engine but should be done for the safety purpose.

1. Loose spark plug start engine to blow out carbon and dirt, shut off engine and remove plug.

2. Test engine compression.

3. If the compression ratio not upto specifications perform engine service that will eliminate the troubles. if the compression is all right re install the spark plug.

4. Remove distributor cap clean it and visually check it for carbon tracks, chips & corroded terminals. Replace it if it is not in good condition.

5. Clean and inspect rotor and replace it if it is not in good condition.

6. Inspect the high tension leads and if they have cracked or frayed insulation or wires or damaged replace them.

7. Check distributor centrifugal advance.

8. Test the vacuum advance.

9. Check distributor contact points and clean them. Read just the point opening.

10. Re install distributor cap and replace wiring.

11. Check battery state of charge, water and hold down clamps.

12. Check battery cables for damage, corrosion and loose connection and make necessary corrections.

13. If battery has been overcharged or undercharged, check the alternator and regulator.

14. Check drive belts and tighten or replace them as required.

15. Check the condition of manifold heat control valve, making sure that it is free to operate.

16. Check the intake manifold bolts for tightness to proper specifications. Even a slight leak will reduce engine performance.

17. Check fuel line for tight connection and kinks beads or leaks.

18. Check the cooling system for leaks, weak or collapse hoses correct coolant level and anti-freeze protection.

19. Check and adjust the accelerator linkage, if necessary.

20. Check crankcase ventilation system.

21. Check intake manifold and air injection system.

22. Remove carburettor, air cleaner and check choke valve to make sure choke is working normally. Clean or replace air filter element, if necessary.

23. Check and adjust contact point dwell and ignition timing.

24. Adjust idle speed and mixture to specifications.

25. Check the doorjamb sticker to see if lubrication is required.

26. Check the working of lights and horn. Check headlight adjustment.

27. Check steering system for looseness and ease of action.

28. Check suspension system and shock absorber for looseness excessive play and wear.

29. Check front wheel and ball joints for excessive wear or loose bearings.

30. Other tests that can be done include cylinder balance test to find a weak cylinder, cranking motor operation, condition of ignition coil and condenser, tightness of mounting bolts, oil level in the engine, air pressure in tyres, condition of tyres and efficiency of the brakes.


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