Hi I am new to this forum, but I'm hoping someone can help me out. I have a 92 Eldorado and the brakes go to the floor. I've bled all of the lines and verified there are no leaks. The brakes will stay up when the car is off, but once I turn it on and the vacuum asist kicks in, the brake pedal goes right to the floor. I've taken apart the master cylinder and it looks fine. Before I give up and drop a hundred bucks on a new master cylinder, I was wondering if anyone else had this same problem.
Thank you in advance.