duramax lb7 mass air flow sensor problems

Acceleration might require a rich AFR, up to 12:1, while cruising requires a leaner AFR, sometimes as low as 22:1.

The ideal AFR is 14.7:1 (14.7 pounds of air to 1.0 pounds of gasoline), but real-world AFR varies. Measuring air mass is critical in calculating how much fuel to add to achieve the correct air-fuel ratio (AFR). The mass air flow sensor measures the air mass flowing into the engine intake. If your vehicle is having performance issues, you may be experiencing one of the symptoms of a bad mass air flow sensor. Several sensors and actuators come into play, such as the mass air fuel (MAF) sensor and fuel injectors, and just as with any other car part, these sensors and actuators can degrade over time. When you increase the diameter of the piping, you allow more air to flow over the 0-5 volt MAF sensor without overwhelming it with more air than it is designed to read through the change in electrical current as air passes over it.Modern electronic engine controls calculate the correct quantity of fuel for a given situation. Also asked, what does a bigger MAF sensor do? This performance MAF sensor increases airflow by up to 45% and low-end torque. The performance mass airflow sensor replaces your OEM sensor and improves on mileage and can increase horsepower by 13. Just so, how much horsepower does a mass airflow sensor add? However, with additional sensors and inputs, an engine's ECU can determine the mass flow rate of intake air.

Neither design employs technology that measures air mass directly. These are the vane meter and the hot wire. There are two common types of mass airflow sensors in use on automotive engines. In addition, a faulty mass air flow sensor might cause the Check Engine or Service Engine Soon light to come on. Can mass air flow sensor affect acceleration?Īs a result, a bad mass air flow sensor causes various driveability problems, including a no-start, stalling, lack of power and poor acceleration.

Duramax lb7 mass air flow sensor problems