How to replace a mass air flow sensor on a F150 is really straight forward and very easy to do at home. The Test to see if you need to replace the sensor is also pretty easy. The Mass Air Flow Sensor of the engine is key to how the engine reacts to its surroundings and mixes fuel to ensure the proper operating conditions. Therefor replacing a bad sensor is a must, the test for the sensor is to start the engine and then disconnect the sensor if the engine continues to run it is a bad sensor. If the engine stops the sensor is good.

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