Mass Airflow Sensor

By David Sturtz, April 15, 2008

The mass airflow (MAF) sensor measures the mass (or weight) of the air as it passes through the throttle body to the intake manifold. It transmits this information to the engine control computer, which helps control the fuel-to-air ratio.

Symptoms of a Bad or Failing Mass Airflow Sensor

  • Engine may run roughly or not at all
  • Poor performance
  • Excessive fuel consumption
  • Stalling
  • Check Engine Light may come on or blink

Mass Airflow Sensor Related Repair Advice

  • To prevent damage to the new mass airflow sensor, all dirt and debris should be cleaned out of the air filter housing and a new air filter installed
  • Mass airflow sensors (MAF) are often replaced when the problem is actually a bad connector or the sensor wiring harness.
  • High-performance style wet foam air filters are not recommended because they will damage the mass airflow sensor and cause poor performance
  • The air duct work between the mass air flow sensor and the intake manifold should be inspected for damage whenever the sensor is replaced

3 User Comments

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By , July 03, 2011
I just bought a 1997 ford expidition/eddie bauer/ having problems with it not wanting to go when I step on excellorator! Is the replacing of the mfs easy or hrd? I am not too wealthy here, fixed income, hopin not too costly. Is this also to do with how the "tac" doesn't work correctly, if at all!! Tranny issues?? I'm told could be that?/ Need good honest person to tell me what to do.
By , July 31, 2017
Can the MAS be the reason why a c240 4matic be shooting ??
By , December 23, 2017
I'm having a problem where I can't sleep peacefully because someone doesn't want me to be able to do what I need to do. They sabotage everything that I touch or do for the past 30years. I mean you would think these secret societies would want people who are interested in what they are doing. They are trying to force me into it. The government isn't much help because it seems like they are part of it to. All I want to do is have truth and justice for the crimes committed against my life. Their rebuttal was secretly legalizing the crimes and making my attempts to make an income seem like justice served. What the hell is wrong with these people. It's not justice served. Especially in a situation where they deliberately destroy everything I do including breaking 4 cars in one year. I don't want to join a group of people who fuck their family members as a pass time while raping children for brunch. Its beyond me that there are people who do that kind of stuff. I feel like you stole my DNA made genetically designer kids with it then raped me in my sleep. That alone should satisfy your lust for power but it hasn't. So now I decided to do a random search on my car not thinking of what you may have done to it to be taunted by more Artificial technology trolling my every move. Plus I guess you are telling me that you plan on trying to frame me for a crime that you committed or to make me seem insane for speaking so openly about what's being done. I feel like the moment you made kids using my eggs you should moved on with your life and left me out of it. I don't want any part of your plan to go to hell swimming in gasoline with sparklers up your arse. Im stuck on this planet until I die and I plan on living instead of constantly fighting some group of perverts with money

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