Question about Cars & Trucks
Brakes sink to the floor but still hold the truck at a stop I checked for air and leaks all good replaced brake module but still have same problem replaced shoes and pads 3 months prior everything was working well until last night
If everything was fine, then it just started going to floor...sounds like your master cylinder is bypassing. Usually a fairly easy job, just be sure you bleed master before u bleed brakes. Best way is completly install it, open (loosen) all 4 lines, then press pedal down. HOLD it down until all lines are tight, then release pedsl. repeat. Do this until fluid with no bubbles/foam/air come out of all lines. And do ALL the lines every time regardless of what comes out, don't skip any. Then you can "pump" the pedal, see how it feels, and bleed each wheel if needed. -There is also a slight chance you have a leak you can't see yet...such as a piston seal leaking into caliper boot.
Posted on Nov 29, 2014
Very bad sign! I would get the car towed to a dealer nearby. It may not be safe to drive. Call the dealer's service department, tell them the symptoms and ask them if it is safe to drive in for repairs. If you have On Star, call them, have them run a diagnostic and ask them if it is safe to drive.
Posted on Nov 29, 2014
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Posted on Jan 02, 2017
SOURCE: 1999 Pontiac Bonneville SE 3800 ABS Brake pedal will eventually reach floor after stopping while hold car stopped. Brake pads replaced less than 5000 miles ago. Fluid level at max and does not drop. O
I would replace the MASTER CYLINDER. BLEED AIR from master cylinder BEFORE INSTALLATION. Hope this helps
Posted on May 18, 2009
SOURCE: fading brake pedal
Perfect well at this point i would say that tha abs valve is bypassing fluid. If you can un hook the line that comes into the abs valve and plug it and try and bleed the system where you cap the line going into the abs valve. If you get a good pedal after pluging the line going into the abs valve this tells me that the abs valve is bypassing fluid give it a try i have ran into this a few time and the abs valve has been bad. Also can you rate this sluton also i do hits on my own free time thanks good luck
Posted on Jan 18, 2009
The parking brake cables may be stretched and in need of adjustment. Follow the cables along to a nut. Then you can tighten the adjusters up on both sides until you have the proper tension. Also make certain none of the brackets are bent or broken that the cables ride through.
Posted on Jan 19, 2009
do you have a self bleeder kit? first off, you have to bleed the master cyl back into its self and the combination valve before you go to the wheels. when you do that, I think you will find that you have air in the lines. disconnect both brake lines from the master cyl and put the bleeder kit fittings on the master cyl, then put the rubber tubing with the kit on the fittings and submerge it in the brake reservoir. make sure its full. then pump the pedal until you get a hard pedal. if that is the case, reconnect the lines to the master, then have an assistant pump up the brake pedal with the engine off, and bleed the combination valve which should be connected to the master by steel tubing. pump it up, then hold it down, and crack the fittings loose, one at a time until the pedal goes about half way down, but do not release the brake pedal until the line is tight again, otherwise you will **** air in the lines. after you do all that, go to the farthest caliper or wheel cylynder from the master and bleed that with the same technique,and dont release the pedal until you close the bleeder screw. unless you have a major prob, this will work.
Posted on Jul 20, 2009
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