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I have a 1986 pontiac firebird with a 2.8l mpfi that pulls a code 34(MAF sensor) it has been relaced and the relay seems to be good but the code keeps coming back as soon as it starts??

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  • Michael Fantozzi Nov 27, 2012

    The code will reset but keeps coming back, and there is no vacum line going to the sensor or relay??

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Disconnect battery for a few minutes or even overnight to reset codes. Also check the vacumme line to sensor that it is clear and has vacumme

Posted on Nov 26, 2012

  • Michael Fantozzi Nov 27, 2012

    i have already reset the code but will not stay off . there is no vacuum line going into the sensor or relay .

  • larry warren Nov 27, 2012

    Sorry I was refering to vac lines in the near vacinity of the throttle body. These sometimes develop splits where they connect and can leak vacumme. A good throttle body clean would be good if you havn' already done this when changing maf sensor

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