Hyundai mass air flow sensor symptoms




Hyundai mass air flow sensor symptoms

Article Navigation:
  • Photo
  • Symptoms of a Bad or Failing Mass Airflow Sensor
  • Video
  • RELATED PAGES
  • Mass Airflow Sensors (MAF) have the responsibility of reporting the amount of air entering the These symptoms indicate a MAF that has a contaminated hot wire. . HYUNDAI TUCSON - MASS AIRFLOW SENSOR - NAPLES, FLORIDA.

    Basically, the MAF sensor—also known as airflow meter—measures However, you can hardly diagnose a MAF sensor on symptoms alone.

    The mass air flow sensor is an important component which the engine control unit depends on. When the flow of air enters the fuel injection.

    Hyundai mass air flow sensor symptoms

    Hyundai mass air flow sensor symptoms

    Other faulty components can also produce these same symptoms, like the fuel pump, fuel pressure regulator and vacuum system. Due to the reason a process known as fuel mapping is availed to decide how much fuel is needed for the particular driving circumstances, new engine administration system usually depend on the exhaust gas sensor to know whether the sensor is having the problem. What do you look at first? It's also possible another issue is making the computer think the problem is with the MAF.

    Hyundai mass air flow sensor symptoms

    Hyundai mass air flow sensor symptoms

    Hyundai mass air flow sensor symptoms

    Hyundai mass air flow sensor symptoms

    Hyundai mass air flow sensor symptoms

    How to Detect and Clean a Faulty Mass Airflow Sensor - CarsDirect

    Notice how closely they follow each other. Jacques Gordon has worked in the automotive industry for 40 years as a service technician, lab technician, trainer and technical writer.

    His began his writing career writing service manuals at Chilton Book Co. Sometimes the hardest part of chasing driveability problems is knowing where to start. What do you look at first? Most techs will grab a scan tool right away, but some of us older guys are more likely to start by looking under the hood for something obvious, like a broken wire or severe neglect or aha!

    Hyundai mass air flow sensor symptoms

    The idle is a bit rough; long-term fuel trim is way negative but short-term is making up for it and the oxygen sensor trace looks normal. After a few minutes at steady cruise, the engine seems smoother but throttle response is still lacking and power is definitely down, especially at wide-open throttle WOT , almost like the engine has a governor.

    The clue is in the fuel trim numbers and the lack of power at WOT. That could be caused by low fuel pressure, but the engine continues running smoothly even at WOT. So the question is, if this really is a bad MAF sensor, how can it have such a dramatic affect on fuel delivery and engine performance without setting a code? Although there are some differences, electronic MAF sensors all work on the same principle.

    Hyundai mass air flow sensor symptoms

    Air flowing past the wire carries away heat, so the current must be increased to maintain its temperature. The amount of current flowing through the wire has a direct correlation to the mass of air flowing past the wire: More current equals higher airflow.

    Depending on the sensor design, the signal sent to the powertrain control module PCM is either analog or digital, so the sensor is usually called analog or digital. This MAF sensor is mounted in the top of the air filter housing.

    The output signal is typically about 0. On MAF sensors from the s and early s, the duty cycle generally tops out at about Hz, but on more modern sensors the duty cycle is in the kilo-hertz range, generally topping out at about 8, kHz. Notice the dirt baked onto the hot wire: By far the most common MAF failure is caused by accumulation of dirt on the hot wire.

    Hyundai mass air flow sensor symptoms

    This insulates the wire from the air flowing past it so less heat is carried away. On some sensors, the hot wire is momentarily heated to about 1, degrees when the ignition is turned off to burn it clean. Performance aftermarket air filters that use oil to trap fine dust particles are a prime source of MAF contamination because people tend to put too much oil on the filter.

    Usually with a dirty MAF, long-term fuel trim will be negative at idle and become more positive as rpm airflow increases. But we just noted that a dirty MAF under-reports airflow; why is long-term fuel trim negative at idle? This sensor is in the intake duct just above the throttle plate. Cleaning it was easy, but the car came back in just a few months with similar MAF sensor issues. So think about what happens when the MAF is under-reporting: At wide open throttle, the fuel system goes into open-loop to provide maximum power.

    Mass Airflow Meter Sensor on a Hyundai Santa Fe 2001-2006



    • Подписаться по RSSRSS
    • Поделиться VkontakteVkontakte
    • Поделиться на FacebookFacebook
    • Твитнуть!Twitter

    Leave a Reply

    Return to Top ▲TOP ▲