@ Ravi, Scary Sculls and all other people who are facing problem with the mileages of their peppy ALTOS.
I have been using my alto LXI since April 2004. Believe me guys each and every KM i have observed my alto very critically, i have felt the every beat of the engine like the beat of my heart.
what i believe is alto if all things set right gives an optimum performance. the 800 cc small engine is very very sensitive to slightest of malfunctions. i have gone through hell lot of experiences regarding my alto to get it right on track and deliver what it is supposed to. Here goes the list which affect the mileage figures of alto. these all things need to be taken care of.
1. Spark plug gap setting - small noticeable effect.
2. Throttle body cleaning - major effect, changes the speed, throttle response, you tend to bottom the pedal to gain pick up, the butterfly valve doesnt function properly, confuses the ECU to deliver the right fuel ratio.
3. ECU/Sensors - This affects the whole functioning of engine. Many times washing engine bay with pressurized water flow causes the MAP sensor, Airflow sensor, the Exhaust sensor or some or the other sensor/electronics to malfunction. this throws a error code to the ECU which doesnt get erased until connected with TECH2. The errors make the car behave very funny with very bad fuel economy coupled with dead pick up and even dead response at the throttle with AC on. This error is very hard to find to a normal driver. u have to feel the engine very critically and keenly. those who dont find this keep on pulling their cars with high rpms wasting more fuel. u need to get this right very soon, plug in the TECH2.
4. Sparkplug wires - small effect, timing problems are associated with this. can be rectified easily during the normal servicing of the car.
5. Valve tappet setting - Major effect, excess fuel consumption, knocking etc.
6. Engine decarb- major effect, MUL recommends engine decarb at 25k kms interval, but if the fuel station is foul, then the small 800 cc engine is affected to a huge extent.
7. Canister/Exhaust cleaning - top speed problem, increase in back pressure, excess fuel consumption. the 800 cc finds it difficult to overcome this barrier. get it cleaned immediately.
8. Belts/Pulleys - ensure perfect slackness in the belts. tight belts or loose belts both cause excess loads on the engine.
9. Brakes - ensure the brakes are not jam. they cause barrier in free rolling of the car and cause excess fuel consumption. make sure all cylinders are working fine and no leakages are there.
10. Coolant - even if the dashboard shows constant temperatures coolant plays important role in maintainaning optimum temperatures of the engine to burn the fuel efficiently. this may have a very small effect on the mileage.
i am not including the other parameters which all people know like tyre pressure,engine oil and other basic things etc. i will contibute more of my findings when i get some more time.
so please check all the above points with MUL service station (authorised only). this will surely get your alto a better mileage. |