I blew a brake line last night, replaced line.bled brakes from master cylinder, brakes very squishy

Brakes were bled from master cylinder.they were squishy before but now it's worse.when the reservoir ran out from the blown brake line It was steamy.it was out of fluid for awhile.I kept it topped off until I got home,about 15 miles.brakes go all the way to floor but still stop it.not very good though.could I have blown the master or could it be because they weren't bled correctly?

My car has 244000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Both improper bleeding and a failed master cylinder could be the fault. Running the master cylinder dry can lead it to fail quickly. The primary seal on the master cylinder piston will tear easily. Make another attempt to bleed the brake system. Start by bleeding the master cylinder. Have a friend pump the brakes. NOTE: Have the person pumping the pedal for you place their left foot under the brake pedal. You should never pump the pedal to the floor or you WILL damage the master cylinder piston seals if they’re not already damaged. Bleed each line at the master cylinder then go to the wheels. Make sure the brake fluid reservoir does not run low during the entire process. Start at the wheel furthest from the master cylinder – the right rear wheel. Crack the bleeder screw loose and allow it to gravity-bleed – let the fluid just run out on it’s own for a moment. Then tighten the bleeder screw and have your helper pump the pedal 3-4 times between each bleed. Crack the bleeder loose again and repeat the process 3-4 times at each wheel as you move closer to the master cylinder. Right rear, then left rear, then right front, then left front. If bleeding the system like this does not restore the brake pedal, then in all likelihood, a master cylinder replacement will do the trick.

How to Identify and Fix Common car Problems ?

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Air in the brake line(s) is the most common cause of a soft/spongy brake pedal. If air gets into the brake lines, it can prevent brake fluid from flowing properly, causing the brake pedal to feel spongy or soft. If the brakes are soft or spongy, this is a good time to change or flush the brake fluid.
However, if air bubbles are in the brake line, hydraulic pressure is reduced, making your entire braking system less effective and your vehicle more difficult to control. This can lead to accidents, harming you and others around you. Now, let`s see how you can slow down the buildup of trapped air in the brake line.
When your ABS system malfunctions are can also cause a spongy brake pedal. Your ABS system is designed to allow the driver to maintain more control of the car in a high-speed stop.
Moisture and road salt corrode the steel over time allowing the brake lines to weaken. Once brake lines become damaged, moisture has the ability to get into the braking system. This can limit your brakes overall effectiveness or cause them to fail completely! Safety is of the utmost importance.
A properly bled brake system will yield a firm, consistent brake pedal feel. To double-check for a properly bled system simply look to the master cylinder. Remove the cover while an assistant pumps the pedal several times, holding it down on the final pump.
If you`re replacing worn brake pads, which can cause air to enter the master cylinder. Braking with worn pads requires more brake fluid, which drains the reservoir and creates space for air. If you change your rotors or pads. Any brake job should include a brake bleed for safety`s sake.
This master cylinder is mounted at a relatively sharp angle. If air enters the left front or right rear wheel circuits it can migrate to the high point. If the vehicle is experiencing a low and/ or spongy brake pedal and the master cylinder is mounted at an angle, trapped air might be the cause.
Air in the brake lines can also cause a hard brake pedal. Air in the brake lines will prevent the brake fluid from flowing smoothly, leading to a loss of hydraulic pressure and a hard brake pedal.
Faulty ABS systems can behave erratically, pumping your brakes even under normal driving conditions, and producing strange clicking noises, even when the brakes aren`t engaged. If you notice any of these random clicking sounds or lock-ups, it`s quite possible that your ABS module needs to be replaced.
Usually, your brake pedal will sink if the ABS or master cylinder cannot maintain the proper hydraulic pressure. This inability to maintain hydraulic pressure will not only make your brake pedal sink to the floor, but it will also make it much more difficult to stop your automobile.
Symptoms of damaged brake lines or hoses:

Visible brake fluid leaks – You may notice a puddle of fluid forming under your vehicle. This can be caused by leaking brake lines. Brake pedal feels “spongy” – A spongy brake pedal indicates that air has found its way into your braking system.

If your vehicle has squishy-feeling brakes, the way to get the air out of the lines is to bleed the brakes. To do the job, you need either a brake bleeder wrench or a combination wrench that fits the bleeder nozzle on your vehicle, a can of the proper brake fluid, a clean glass jar, and a friend.
Consider replacing or cleaning the brake fluid if you detect soft or spongy brakes. Flushing brake fluid removes air from the brake system and is also known as bleeding the brakes. Air can get trapped in a system if it is not thoroughly bled after replacing a component.
The most common reason for a soft brake pedal is simply air still in the system. The easiest way to diagnose this problem is to pump the brake pedal gently a few times. In doing so, the pedal should become firmer with each gentle press of the pedal.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

I blew a brake line last night, replaced line.bled brakes from master cylinder, brakes very squishy
ANSWER : Both improper bleeding and a failed master cylinder could be the fault. Running the master cylinder dry can lead it to fail quickly. The primary seal on the master cylinder piston will tear easily. Make another attempt to bleed the brake system. Start by bleeding the master cylinder. Have a friend pump the brakes. NOTE: Have the person pumping the pedal for you place their left foot under the brake pedal. You should never pump the pedal to the floor or you WILL damage the master cylinder piston seals if they’re not already damaged. Bleed each line at the master cylinder then go to the wheels. Make sure the brake fluid reservoir does not run low during the entire process. Start at the wheel furthest from the master cylinder – the right rear wheel. Crack the bleeder screw loose and allow it to gravity-bleed – let the fluid just run out on it’s own for a moment. Then tighten the bleeder screw and have your helper pump the pedal 3-4 times between each bleed. Crack the bleeder loose again and repeat the process 3-4 times at each wheel as you move closer to the master cylinder. Right rear, then left rear, then right front, then left front. If bleeding the system like this does not restore the brake pedal, then in all likelihood, a master cylinder replacement will do the trick.

I just replaced my brake master cylinder and the brakes still feel soft. What do I need to do after I replace the master cylinder
ANSWER : From what you’ve described you will have to bleed your brakes. Also, I believe you may have a leak in one of the lines. You may want to use a wrench and tighten the lines a little more. If you’re unable to fix this yourself, consider YourMechanic, as one of our mobile technicians can come to your home to bleed your brakes, diagnose the Check Engine Light, and help you make the appropriate repairs to your car.

Low brake pedal and anti-lock brakes are not kicking in.
ANSWER : The brake pedal is working to stop the vehicle, but there may be air in the controller unit causing the ABS brakes to not function. I recommend bleeding the brake system from the farthest location from the master cylinder to the master cylinder including the ABS unit. If the brakes are still spongy after a full bleed, then the controller will need to be replaced. If you need further assistance with your brake pedal being spongy, then seek out a professional, such as one from Your Mechanic, to help you.

Changed brake master cylinder, bled 10 times, and the pedal is soft The rear brakes are not locked but close. Truck now running rough.
ANSWER : You will have to bleed the brakes from the farthest location all the way to the master cylinder. There is still air in the lines causing the issue. Check the vibrations on the vehicle to see if the engine mounts are damaged or if the brakes are not releasing causing the engine to run harder than normal to overcome the braking force. If you need further assistance with your vehicle’s brake system, then seek out a professional, such as one from Your Mechanic, to help you.

Soft brake pedal after replacing rear brakes and master cylinder 2003 Audi A4
ANSWER : Hello. If you have no pressure to the rear calipers at all and if the master cylinder is new then you may have forces some debris into the ABS unit when you compressed the pistons in the rear calipers. In some cases the system can be pressure bled to fix it but it may need a new ABS unit.

abs light on brake line broke have been replace I bleed brake line but brake pad still go to the floor now wheels lock up
ANSWER : Hello. If the brake pedal is going to the floor then that means that it is not building pressure. If the brake system has been fully bled and there is no air in it then most of the time it is a bad master cylinder or it can be caused by a bad ABS module. If the brake fluid was low and if air got into the system then the only way to properly bleed it is with a scan tool that would allow you to open and close the valves in the ABS unit. Air gets trapped in these easily if the brake fluid gets low. This can also explain why the brakes are locking up. I would usually use my scan tool to bleed the system out first before going any further. I would also scan the brake control module to see what it is reading as a fault. If there is no air in the system and if there is no prominent code then I would replace the master cylinder first. If you want to check out why your brakes are locking up, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

hard brake pedal with engine off no pedal when started replaced all brakes rear clyinders and master cylinder no air in lines
ANSWER : From the description provided, my first step would be double checking the connections at the master cylinder as well as double check the flexible brake lines at each wheel. A small leak can duplicate the brake pedal falling to the floor. If you are 100% certain there is no air in the system, it is very possible that your F-250 may have a faulty brake master cylinder.

The brake system on the your 1987 Ford is pretty basic and if there are no leaks, then it is VERY likely the master cylinder is the problem. If you are performing the work yourself, you may want to try exchanging your brake master cylinder for a new one.

Be sure to properly bench bleed your brake master cylinder before installing it on to the brake booster as well. I would then bleed the entire brake system at each wheel just to be sure there is absolutely no air in the system.

Of course if you did not perform the work yourself, or if you feel like you’re stuck, then I would recommend enlisting the assistance of a certified technician. They will be able to quickly determine the reason for your brake pedal falling to the floor.

I need to replace the master cylinder brake on my 1988 Grand Marquis
ANSWER : The brake master my need to be replaced but you still need to locate the leaks first if you are losing fluid. You should have every brake line checked to see what is leaking. If the lines are rusted and corroded then they all may need to be replaced. The master cylinder can then be replaced by a mechanic like one from YourMechanic. You may need to activate the anti-lock brakes with a scanner in order to bleed out the brakes correctly. Replacing the major components of the brake system take skill and expertise and should not be taken on if you are not experienced or do not have the correct service manuals.