still spongy

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mikec

mikec

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i have 73 dodge dart power front disc brakes and 10" rear drums, changed all lines, hoses, calipers, wheel cylinders, rotors , drums , hardware, master cylinder, booster, pads and shoes using dot 3-4, flushed and bled, brakes work but not strong, when I check master cylinder you can see fluid move in front chamber(rear brake ) but little movement of fluid in back chamber(front brakes) proportioning valve is original to car and only thing haven't changed, fluid pumps through during bleeding , was wondering if valve could be bleeding off pressure internally? making spongy brakes, any thoughts would be appreciated, thanks
 
Clean out the prop valve? Just a guess. My 74 had a distribution valve that I thought was a prop valve!
 
That was a one off specialized made for me 4 door classic. I am sad now. LOL
 
I changed proportioning valve and re-bled brakes now have solid pedal ,problem fixed
 
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