I wasnt wrong, it was the booster. A friend had his stock booster laying around so i tested it out and everything worked like a charm. Most people who replies dont bother to carefully read what i have posted and assume im guessing. As for the experience i didnt have a installation guide but did managed to get it installed by myself just fine, it was just very unfortunately the part turn out to be defective.

 

Glad you got it fixed.

 

This sounds like guessing to me as you were asking what could cause the issue. Yes, you had an idea but you werent sure, otherwise you wouldnt of posted a thread titled "brake issue please help".

Tnyways glad you were able to get it fixed without thoughing a bunch of parts at it and a bunch of money.