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    1963 Peugeot 403 1.5L 1BL OHV 4cyl

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    Mass Air Flow Sensor

    Mass Air Flow Sensor Operation:

    Measures the volume and density of air entering the engine, so the electronic control module can determine how much fuel is needed to maintain the correct air to fuel mixture. There are two basic types: heated wire and heated film (grid); both work on the same principle.

    How To Instructions:

    Inspect - Check for obvious problems.
    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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