You have probably lost brake fluid, likely through a broken/rusted out brake line. DO NOT ATTEMPT TO DRIVE THE VEHICLE IN THIS CONDITION. If you are not familiar with locating and repairing brake lines, please get your vehicle towed to a reliable mechanic and have the entire brake system inspected and properly repaired. This is not something to try to patch up and make it last a couple more days/weeks/months. Your life and the life of other drivers are dependent on your vehicle being safe, and poor brakes are NOT SAFE.
Find and repair the leak, then fill and bleed any air out of the system.
SOURCE: no brakes
Hi,
Check the Brake master pump......If the padle drops to the floor means The booter is ok,,,,! I think the Brake master pump has a internal leak.....Reply me.....
First look for obvious leaks under the vehicle, especially the inside area of each wheel... If you see fluid, you have either a blown cylinder seal or a bad line (check the rubber hoses to the front and back brakes too) Repair the offending part and bleed the air out of the system... (remember to clean pads or shoes if they have fluid on them)... If you see no hint of leakage anywhere, then suspect the master cylinder... if you remove the master cylinder, check and make sure that it didn't leak fluid into the brake booster diaphragm (Brake fluid will destroy the booster)... as in any repair when you open the system (lose fluid), you will need to bleed out the air to restore function... hope this helps...;-)
SOURCE: 99' Audi A6 2.8 Q no brakes, low to no pedal pressure...
Not likely the ABS pump there is something wrong with the mechanical brakes it sounds like the emergency brake is not adjusted try adjusting the rear cable first then pull the emergency brake and push your foot on the brake if it is still to the floor you have a problem with a cylinder or a mechanical adjustment, if it's higher with the E brake on then you have the adjusters not set right and the cables not adjusted, So adjust the cables first. If the brakes are spongy with the engine off then it will need to be power bleed if that does not fix it then you may have the wrong brake shoes or pads on the car. Did you install the plates in the wheel rotor front braes? If not you lose 1/4 inch travel on the from pads, if the basic brakes are not right the ABS side is not going to be right so those problems have to be dealt with first. Also DO YOU HAVE A POWER ASSIST BOOSTER IF SO IT COULD BE BAD, TO TEST HAVE SOMEONE STEP ON THE BRAKE PEDAL AND PULL THE HOSE OFF THE BRAKE BOOSTER IT'S behind the master cylinder (sorry for the caps) if you don't here a suction sound when you remove the hose then you have a bad heck valve by the booster connected to the hose that plugs into the booster. if all of this is ok then it may be the ABS booster but normally its a bleeding problem. write a comment if this does not help or you need another lead,
SOURCE: brake pedal dropping to floor
do u have the antilock brake bleeding tool? if not you will need to have the dealer bleed the brakes, the ABS control valve must be electricaly held open to bleed the brakes there of course is a special tool for this.
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