Question about 2002 Chevrolet Malibu

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High gas consuption, I heve seen by several months my Malibu 2002 LS has a high gas consuption, I have already changed sparks, fuel and air filter. There is sombody solve this problem?

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  • ermzmata Apr 18, 2009

    Thanks dear friends for you answer

    I am refering about a normal consuption it could be 20 to 25 mpg, depending where use the car highway or city. I have seen a consuption arround 15 mpg using my car in the city. I feel my car with a high acceleration, and my question is If i should change the TPS sensor?

    If you have comments please let me know.

    Thanks a lot

  • ermzmata Apr 19, 2009

    Ok let me try to run my automobil in highway in order to know the consumption, but it is a good point about O2 Sensor.

    Let me try it and update the information.

    Thanks by advance


  • Richard Camp
    Richard Camp May 11, 2010

    From what you said in your clarification it sounds like the mpg for the city is right on. Starting and stopping reduces the fuel economy quite a bit in the city. The 20 to 25 mpg would be the manufacturers recommended highway mileage for freeway driving. How many miles do you have on the vehicle currently? You could spend the money and have the vehicle tested on a dyno-emission diagnostic machine where they actually run the vehicle under load to see if the emissions are within limits, and if not it could just be a O2 sensor that needs replacing. If the engine has lots of miles the O2 sensor sometimes gets plugged up and this can effect the vehicles fuel economy since it controls how the ECM computer allots fuel to the engine. Good Luck, RAC

  • yadayada
    yadayada May 11, 2010

    why would u change the TPS, what diagnostic tests lead u to believe it is defective? do u have a trouble code for the TPS circuit? do u have a check engine light? I think you don't have any problem except this perception that u should be getting better fuel mileage.

  • ufuknut May 11, 2010

    tire pressure. if its to low then you will use a lot more gas.

  • yadayada
    yadayada May 11, 2010

    do u have a check engine light on? if not the system is running as designed, which is optimum fuel economy.



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A failed camshaft position sensor will show up in a number of ways. The worst-case scenario is that there is no spark in the combustion chamber. Other symptoms can include excessively long cranking time when starting cold, rough running on an intermittent basis, poor idle, stumbling or hesitation, a drop in mileage and stalling upon acceleration. These symptoms may also be caused by a failure in the wiring of the sensor.

Posted on Sep 13, 2010

  • carl Sep 13, 2010

    if light is on get it scanned to find problem code, if it is on, could be a bad 02 sensor.



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