hello,as the title suggests, I have a strong doubt on the proper functioning of the air mass meter for my bmw 530d,after having remapped the car has no defect delivery,which I know to be empty or sobs,absolutely linear one issue that has not the performance that is due, I was told that may be he who is guilty....
diagnosis is not giving any error and it is the original of 2004....
how can I test its effectiveness???