Mass Air Flow Sensor Problems

Discussion in 'General Chevy & GM Tech Questions' started by chevyman1297, Sep 25, 2009.

  1. chevyman1297

    chevyman1297 New Member

    2002 S10 Skips bad and blows out black smoke with the MAF sensor plugged in but with it unplugged it runs fine. What are the chances of having a bad sensor??
     
  2. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    I would say quite good! Have you tried cleaning it?
     
  3. msvx95

    msvx95 Rockstar

    What kind of air filter do you have? If you are using one you have to oil...maybe some oil coated the sensor.

    I think brake cleaner should work well to soak the sensor in.
     
  4. jt_5.7

    jt_5.7 Rockstar

    get some maf cleaner it works great
     
  5. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    You may have a bad sensor or it could be something else. I would check the trouble codes as well as clean the sensor before buying any parts.
     
  6. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    CRC makes a MAF cleaner. Its in a silver can. Dont use throttlebody, carb or any other cleaner except MAF cleaner.
     
  7. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    Good tip! The carb cleaners will leave an oil based residue which will skew the sensor reading causing a loss of power.
     
  8. 2COR517

    2COR517 Epic Member 5+ Years 1000 Posts

    Very good suggestion.



    You definitely don't want to use brake cleaner, and you don't need to soak it. As mentioned before, use the CRC MAF cleaner ONLY.

    Just spray the wires with the cleaner. No fingers, q-tips, compressed air, nothng. I like to take the actual sensor out of the fitting assembly. The honeycomb on the inbound side makes it difficult to clean the MAF wires.
     

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