Everyone has to bring up his vehicle to a proper pitch to make it more fuel efficient. Motorized vehicles especially need this attention. The tuning up task has to begin with replacement of filters.

The more often you tune up your vehicle, the result will be more positive. According to experienced motor mechanics, the tune up is essential when a vehicle runs over 100,000 km. The priority has to be on engine air filter. The location of the air filter is above the carburetor in the old type cars or in the air box in the new ones having fuel injected motors.

Fuel filter requiring replacement will normally lie between the engine and fuel tank. If not replaced, the clogged filter may weaken the performance of the engine. If the engine light is on many times during the check on the engines, it is an indication of mal- functioning of the O2 sensor.

The normal tendency is to replace it when it fails totally, but remember that they would not last long. This is another opportunity for you to replace your transmission filter failing which, a transmission filter after running a lot of miles, the transmission could be slipping. Unless you have proper expertise, it is advisable to attempt these checks and replacements by a mechanic.

Normally the location of the filter in a vehicle will be under the transmission pan. The transmission filter can be pulled out straight after screwing it down. Another area of priority attention is the ignition system. Even before a vehicle completes 100,000 km, the spark plug wires are likely to be worn out.

Hence when your car has been driven for quite a distance, do some parts replacement to save money and avoid unexpected troubles. If the spark wires are worn out, your car start running rough and consume more fuel. When going to replace the car plug, consider changing the distributor cap and the rotor.


It is easy to change the distributor cap which is usually resting on two screws. Always remove the distributor cap first to keep the wires running to the correct spark plug. On remover of the cap the rotor will appear under it with a push in tab for its release. On installation of the distributor cap, go removing one spark wire.

The next phase of action is replacement of spark plugs which will usually have 5/8” or 13/16” socket. The spark plug has to be replaced with a new compatible plug and the gap checked with a feeler gauge, until it reaches the gap between .030” and .045” depending on the type of vehicle.

Follow by checking the wire distributor cap and trace the wire back to where it needs to be on the new cap and all wires and plugs are to be similarly connected without mixing up. The ignition timings should be advanced around 8 to 12 degrees or zero in new cars, after checking and connecting the timing light to #1 spark plug wire.

Any excessive oil found in the air filter needs to be replaced with the positive crankcase valve, which can be found in the head, valve cover or cleaner. The PVC valve will be fine, if no oil is detected in the air filter. Once all these checks and replacements are completed, your car will run with power and smoothness helping you to achieve fuel economy.