We replaced the master cylinder due to internal leak on old one. The brakes were very soft and no fluid in reservoir. After we checked lines and wheels and saw that they were not wet, so put on new master cylinder. Did bench bleed before installed and bled at wheels. Now when you push the brake pedal it goes to the floor and stays there will not come back up. You cannot pull it up. It will only come up if you turn off the vehicle or unhook the vacuum line on the brake booster. The brake booster has strong vacuum. What could be causing the brake to stay down?
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Monday, April 2nd, 2018 AT 6:44 PM