Q: Brake Spongy after Bleeding

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The other day I was going down the road and my driver's side rear brake line gave up. It was spewing brake fluid as i pressed the pedal. I got home safely, got some parts to repair it, and fixed it. There is no leak anymore, but I am not sure about air in the system. I bled the brakes as good as I could from the lines because my bleeder valve is rusted. I am not sure but the brake light is still on on the dashboard, and the brakes still feel like I have no brakes. I have to drop my foot to the floor to even stop. I think I bled the system the best I could, and I am still clueless. Worse comes to worse I will have to take it into a shop and get then to diagnose/fix the problem because I have no clue what it is. I do not own a OBD II scan tool so I can not see what the sensor is imputing to keep the light on the dash on.

My car has 180000 miles.
My car has an automatic transmission.

There is either air still in the brake lines or potentially a bigger problem at stake like a potential vacuum leak in the brake booster. Before diving into the brake booster, I would suggest having an expert from YourMechanic come to your home to diagnose your braking system and repair it.

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