Brake warning lights are on, brake fluid is fine, brake pedal slowley travels to the floor after stoping and slowley boost back up
SOURCE: anti lock brakes
Well this is very serious I hope you deal with it right away. You mentioned that sometimes the pedal was hard,do you mean that its all the way up and it doesnt feel like you have power brakes?? If so have you noticed any sounds like air escaping (swoosh sound when brakes applied)? Failure of the power booster causes pedal to become very hard and could possibly be your problem for hard pedal if I understood you correctly. check to make sure that vacuum to the booster is conected properly and hose not kinked..Now for the solution for the pedal fading to the floor... You either have air in your brake system, A bypassing master cylinder , or a hydraulic leak...Were your brakes serviced recently?? if so try bleeding your brake system first...That would be the first step if still the problem persist I would isolate exactly where the problem was coming from.. To do this you would start at the passenger rear wheel and line clamp the brake hose to make that part of your brake sytem inoperable...when clamped try your brakes and note if brakes improved or had know affect on system (when testing obviously im not suggesting you drive to determine results of test procedure)repeat test for each wheel you have isolated the problem when brakes feel normal with one wheel clamped,which ever it may be.. This isnt as hard as it might soun and if you are confused at all dont hesitate to ask questions... Remember the only dumb question is the one you fail to ask I would hate for you to get into an accident ... Good luck!!!
SOURCE: no brakes - pedal travels tro the floor!
chang the master cylinder it is bleeding by in side the master
SOURCE: Brake & ABS Warning LIght
There is a known failure of the ABS system control board which typically causes this problem. THere are companies out there that will rebuild your current board (if it's rebuildable). Do a search on ABS repair in Moscow, Iowa.
They will rebuild the module for $150.00 and warrant the repair for 5 years (as opposed to up to a $1000 form GM, and no guarantee as to how ling it will last.).
I did this to my '01 Tahoe and am real happy with it. The company offers diagnosis tests to help you determine if the problem is your ABS module.
Reply back what you find.
SOURCE: 94 buick brakes
There could be 2 reasons that the pedal would go to the floor.1 -there is air in the system.If no one has taken a line loose then it will be #2 -the brake master cylinder has gone bad and will need to be replaced.Ther will be directions on how to do this proporely with the replacement unit.if you need further assistance let me know.
Fig. Fig. 3: ABS hydraulic modulator/master cylinder bleeder locations
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