Symptom: A Passat B5GLi sedan, the engine speed to 3500r / min, the speed can not continue to rise, the more oil, the more the speed down, as if the engine speed limit. The car is driving 25000km.
    Troubleshooting: VAG1551 with a fault reader to read the fault code, no fault code exists. Observe the data display of each sensor, coolant temperature sensor, throttle position sensor, oxygen sensor, air flow meter and other data are normal.
    Check the fuel system pressure, normal. Check the injector, high pressure line, spark plug, also normal. Detection of cylinder pressure, also normal.
    Suspicious parts of the inspection, the fault has not yet ruled out, is not careful inspection, or another reason? Connect the fault reader VAG1551, read the engine at a speed of 3500r / min when the data block, found that the speed of 3500r / min, the air flow meter data can only reach 12-13g / s or so, can not continue to rise. As the data on hand without this data, so I do not know whether the test data is correct.
    At this time, the maintenance staff thought of a previous repair of a Santana 2000GSi (Time Superman) car, the car is an emergency acceleration when the tempering, the inspection is also no fault code, the data block is normal, idle air flow meter signal Value of 2-5g / s, slow acceleration can rise to about 12g / s, rapid acceleration can only reach 15-17g / s, release the accelerator pedal can reach 40g / s or so. The standard data of the vehicle acceleration can not be found in the data, so get a normal work Santana sedan, the detection found that the idle air flow meter signal value of 2-5g / s, slow acceleration of 14g / S or so, rapid acceleration can reach 40g / s, maintenance personnel to replace the fault of the Santana 2000GSi car air flow sensor, the fault can be ruled out.
    Is the fault of the Passat B5 sedan caused by the failure of the air flow meter? Replace the car air flow meter, troubleshooting.