Looking at previous logs I have made on my A4 MAF readings at Idle with no boost are around 420-450mg/stroke dependent on the idle rpm whether it's hot or cold.
Normal hot idle speed is around 650rpm.
If you have 1 bar boost then you would end up with around twice that reading. As the air intake isn't throttled there is usually a good amount of excess air.
If you disconnect the MAF you should get a fault code and the engine would switch to a get you home strategy . On petrol cars if the MAF is failing quite often it runs better when it's disconnected as the ECU just ignores the incorrect info and calculates it's own value based on other sensor readings.
Normal hot idle speed is around 650rpm.
If you have 1 bar boost then you would end up with around twice that reading. As the air intake isn't throttled there is usually a good amount of excess air.
If you disconnect the MAF you should get a fault code and the engine would switch to a get you home strategy . On petrol cars if the MAF is failing quite often it runs better when it's disconnected as the ECU just ignores the incorrect info and calculates it's own value based on other sensor readings.