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  1. matgray

    Oxygen sensors

    by measuring the effectiveness does it alter the fuel to air ratio at all
  2. matgray

    Oxygen sensors

    Hi, most modern cars have two oxygen sensors on them,one usually in or close to the manifold for adjusting the air fuel mixture accordingly, what i would like to know is what the second oxygen sensor is for,as every body i have asked has a different opinion from,its a back up sensor to i havent...

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