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    1986 Buick Riviera 3.8L SFI OHV 6cyl

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    Oxygen Sensor

    Oxygen Sensor Operation:

    A device found in the exhaust manifold, which generates a small voltage dependent on the amount of oxygen present in the exhaust stream, used as a signal to the engine-control computer to determine the amount of fuel necessary to maintain a proper air/fuel ratio.

    How To Instructions:

    Test - Give it an in-depth diagnosis.
    Replace - Out with the old, in with the new.

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