I have a 99 cobra and I change the springs on the car, but as I did that I decided to disconnect the brake line from the caliper in the front so that the caliper woud be out of the way but anyways now i put it back together and I CANNOT get the brakes bled. I started with the back right then to the left and then to the right and then to the left brake caliper and I have done this many times. It is also making a hissing sound when i apply the brakes. i dont think there are any leaks in the line. But your help would be appreciated. Thanks.