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mushy pedal new master need help

  1. Can't Get Pressure To Brake Pedal After Master Cylinder Replacement Pedal Hiss When Held Down Any He

    Dodge Nitro Mechanical Problems and Questions
    I swapt out my master cylinder for a new one because I noticed paint was coming off my booster I had been bleeding them without luck I bench bled my master and put it on and now I have no pedal at all... and when held in I get a hiss like air escaping is it the abs module or bad connection to...