Recently i noticed that i didnt have any brake fluid...so i filled up...and bled the brakes...but the brakes are still going straight to the floor when i try. Ive heard rumors of it might be problems with the master cylinder...what should i do? any suggestions?
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Re: Brakes Straight To The Floor...
When you filled the master and bled the brakes did the pedal hold our did it slowly go to the floor if it did there is a leak check the back of the master also check the brake rod under the dash , remove all off the wheels and check for leakage do not drive the vech until you done this saftey issuse good luck kdc744
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If there is a substantial fluid eruption, there are air bubbles still trapped in the system. You must repeat the bleeding procedure to remove that air. A modest disturbance in the fluid returning to the reservoir indicates a properly bled brakesystem.
Car and DriverIf there is a substantial fluid eruption, there are air bubbles still trapped in the system. You must repeat the bleeding procedure to remove that air. A modest disturbance in the fluid returning to the reservoir indicates a properly bled brake system.
first did you perform a bench bleed on the master cylinder? if not bench bleed the master cylinder. had a neighbor with a similar problem with a ford truck. did some reaserch and found the ABS system needed to be bled. one way to bleed air out of it is to connect the diagnostic computer and perform an ABS bleed and then bleed the brakes like you normaly would. The other way was to take the vehicle somewhere you can slide around safely and slam on the brakes causing the ABS to activate. do this a few times and then perform the normal bleed method.
Sounds like the calipers weren't bled or weren't bled sufficiently. You should have a helper pump up the brakes. Then you should open one of the bleeder screws. The brake pedal should fall to the floor and air and/or fluid sould come out.. Close the bleeder before your helper lets the brake pedal up. If any air comes out repeat the process until only fluid comes out. Now repeat the process on the other caliper. Be sure to check the fluid level in the reservoir often to make sure it doesn't go empty.
There may be air in the lines. Bleed all your brakes starting at the farthest wheel from the resevoir, and finishing at the closest one. Try the pedal after its bled. If the pedal still feels soft or travels to the floor there may be a pinhole leak that may be spraying on the underbody of the car, or the seals in the master cylinder are gone filling the vacuum booster(if equipped). Air compresses more than oil so if bleeding works that may be the problem.
When you fixed the brakes, did you take the lid off the master cylinder. I just wonder if you spilled out your brake fluid. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. Check the fuse. Check the brake fluid level. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. Please give me a good ratin and keep me informed.