Question about 2003 Chevrolet Malibu

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I have a huge loss of power. The car idles ok but has not power to excelerate. The engine light just came on. Can this be a fuel pump or injector problem?

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When the check engine light comes on it indicates the engine control computer (called the PCM) has detected a failure in the electronic fuel injection or emission control system, the 1st phase of finding out what the problem is being caused by is to run a OBD2 electronic engione control fault code test, this can be done with a generic code reader avail from any auto parts store, you can also get a free fault code test run at any Kragen auto parts or Autozone, other so called discount auto parts stores do this for free as well, the code will have a definition attached to it, it is likely you have either a fuel pressure problem or a MAF (Mass Airflow) sensor failure, but both of these repairs are expensive so don't guess get the test run.

Posted on Jun 04, 2010

  • frazierbrian Jun 04, 2010

    Do you think it could be a fuel filter or fuel pump issue

  • yadayada
    yadayada Jun 04, 2010

    yes that is possible, change the fuel filter and have the fuel pressure tested after that is done, it requires a special fuel pressure test gage, the test post is on the top of the engine in the rail that delivers fuel to the engines fuel injectors, it looks like a large tire valve with a cap on it I would suspect the fuel filter before the fuel pump, but a fuel filter usually doesn't turn on a check engine light, so have the test done, it is free.


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