My pedal sinks when i start to drive and want to come to a stop it hits the ground. I have to slam on them and it slowly stops. has decent pedal pressure at idle. Really feels good when ebrake is up.
i really think its the master cylinder becuase i bled it 3 times over and it still bubbles inside the resevoir. i think this remanufactured crap mc are not being rebuilt right and the main seal is leaking internally.
i dont loose any fluid and i have check my vacuum and its at 20hg at idle and 18hg under load so still good. Also has new check valve.
If you really believe that it is the master cylinder that is bad, then confirm it with an isolation test. Put two plugs into the ports and pressurize the master cylinder with your foot. If the pedal sinks, it is bad. If the pedal stays firm, you still have air in the system. Good Luck
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