What is Engine Tuning and its Procedure?

The engine is the most valuable component in the vehicle used to perform the output of the power. This engine drives the whole vehicle on the road. In this article, I will discuss the what is engine tuning and its procedure.


What is Engine Tuning

The Engine tunning deals with the procedure which includes testing the various components and accessory systems involved in engine operation. Tunning goes further than mere testing. It also includes readjusting or replacing parts as required to restore new engine performance.

In some cases, during the tunning, serious troubles may be uncovered that will require major repair work. In other words, engine tuning is a procedure to make an engine in good mechanical condition to operate at peak efficiency and power. Every unit of the engine is made to function at its best.

Engine tunning is more frequently required in modern high-compression engines, Which are more sensitive to variants from specifications than the earlier low-speed, low-output engines. To maintain an engine at peak performance and economy, it must be kept in good condition with all components up to specifications.

Often during the engine tunning, several conditions will be found which must be corrected to restore the engine to like new condition. 

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What is Engine Tuning Procedure

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

  1. Loose spark plugs, start the engine to blow out carbon and dirt, shut off the engine, and remove the plugs.
  2. Test engine compression.
  3. If the compression ratio is not up to specifications, perform engine services that will eliminate the trouble. If the compression is all right, re-install the spark plugs.
  4. remove the distributor cap, clean it, and visually check it for carbon tracks, chips, and corroded terminals. Replace it, if it is not in good condition.
  5. Clean and inspect the 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 the distributor cap and replace the wiring.
  11. Check the battery state of charge, and water and hold down the clamps.
  12. Check battery cables for damage, corrosion, and loose connections and make necessary connections.
  13. If the 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 the 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 lines for tight connections and kinks, beads, or leaks.
  18. Check the cooling system for leaks, weak or collapsed hoses, correct coolant level, and anti-freeze protection.
  19. Check and adjust the accelerator linkage, if necessary.
  20. Check the crankcase ventilation system.
  21. Check the intake manifold and air injection system.
  22. Remove the carburetor, and air cleaner, and check the choke valve to make sure the choke is working normally. Clean or replace the air filter element, if necessary.
  23. Check and adjust contact point dwell and ignition timing.
  24. Adjust the idle speed and mixture to specifications.
  25. Check the doorjamb sticker to see if lubrication is required.
  26. Check the working of lights and horns. Check headlight adjustments.
  27. Check the steering system for looseness and ease of action.
  28. Check the suspension system and shock absorber for looseness, excessive play, and wear.
  29. Check front wheels and ball joints for excessive wear or loose bearings.
  30. Other tests that can be done include a cylinder balance test to find a weak cylinder, cranking motor operation, conditions of the ignition coil and condenser, tightness of mounting bolts, oil level in the engine, air pressure in tires, condition of brakes, and efficiency of tires.

Read more- Automotive Safety | 10 Safety Features What You Need to Know Now.

Advantages of Engine Tuning

There are a lot of advantages an engine tune process can give you. The advantages are-

  1. Tuning can increase the engine torque and output power of the vehicle.
  2. It increases the fuel economy of the engine.
  3. This helps to increase the throttle response of the vehicle and also helps the driver output.
  4. With some applied methods tuning helps to minimize the engine stalling.
  5. Engine tuning also helps to make the engine life longer.
  6. The exhaust emission of the vehicle can be controlled by tuning.


In conclusion, engine tuning offers a range of advantages including increased power, improved fuel efficiency, enhanced throttle response, customizable performance, optimized engine longevity, diagnostic capabilities, adaptability to modifications, and legal compliance. However, it’s essential to approach tuning with caution, ensuring that it’s performed by qualified professionals using reputable methods to maximize the benefits while maintaining the reliability and legality of the vehicle.

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