When waiting for a red light, the feeling of some braking problems, hard at the foot, as if not in the end look like. The next day, carefully looked at the brake system, did not find the phenomenon of oil spills, there is no other exception. On the road test problems still.
    Second, the maintenance process:
    A master to test, he came back as if the brake power is small, the cause may be gas leakage. It turned out that Jetta's brake boost was by pneumatic rather than hydraulic. When the gas barrier or leakage, it caused the power failure or lack of help. (B) the pipeline leak or gas blockage, the new car may be lash, resulting in leakage. (2) pipeline leakage or gas blockage, the new car may be lax, resulting in leakage. The master opens the front cover and sees a black pipe under the front window. The left side (driving side) is fine, the right side (the co-pilot side) is thick, and the middle left position is a T-type connector that can be pulled out by hand Off the gas road), off the gas after the engine idling, the coarse end of the gas source spray, issued a "bared bared" sound, the broken side of the mouth blowing blow, said ventilation, and then judged to be The connector is not tight, re-inserted plug connector. Close the car cover, on the road test. All right.
    Third, empirical analysis:
    Caused by the lack of power to help the brake caused by the majority of the reasons are caused by the airway failure, their first hands can check whether the gas path is blocked; and then check whether there is leakage of the place, if it is the old car to see if there is no cracks in the pipeline Phenomenon, such as no longer check whether the joints leak. Master said he can let the car idle with soapy water may leak the place, found that there are bubbles on the air leakage, in the unconditional replacement of the pipeline when the tape can be used to temporarily leak the air, the conditions must be replaced pipeline, Brakes But big problems, not sloppy!