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Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you loosen the line at the proportioning valve and press the breaks are you getting a good flow of break fluid to the valve from the front break line? Check this and post back with the results and we can work from there.