brakes dont work when car is started on 1990 Dodge Dynasty

i replaced master cyclinder brake booster and bleed all the brakes and when you start the car there is no brakes

Asked by for the 1990 Dodge Dynasty
This can be many things. Where did you get the master? If it is not a factory quality unit, then I have seen many problems with 'rebuilt' master cylinders. I will never use them.
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