Start the car, put it in gear and apply brakes and keep them on. If the car starts to go forward after a few seconds it is the master cylinder. Is the brake warning on the dash on? Im also thinking a leaky brake line but that is easy to check. Brake fluid level then look for the oil.
The rotors are never "fine" after thousands of miles of braking. The glaze that burns into the metal needs to be removed. The glaze keeps the heat from dissipating properly and causes brake fade, noise, and warping. we don't even know if you guys know how to clean the caliper brackets right so you get the correct tension on the pads. Did you even wire brush and lube the slide pins?
I think you don’t know what you are doing. First you describe that the brake pedal is going to the floor, then you describe that before that, it was stiffer and harder to push. You can’t have it both ways, it’s either stiffer or softer. If you have soft brakes, you need to bleed all of the brake lines of any air. If you have stiff brakes, you need to replace the brake booster or there is a problem in the master cylinder.
Did you bleed the brake?
Check the rear brakes. If they are shoes you may need to adjust them out further as in closer to the drum, You can accomplish this by going backwards and braking in reverse numerous times. If all is working fine back there they might come up. If that doesn't fix it then a brake line bleed is in order to get your firm pedal back. A brake fluid flush would not hurt either. You also could take a look at your power booster vac line and see if it is healthy. Post updates if further help is needed.
there is probably air in your brake lines (meaning that no fluid is going to the brakes when you hit the pedal). or maybe you have low brake fluid. Check this out http://www.wikihow.com/Bleed-Brake-Lines good luck!
I noticed the other night that my brake pedal was practically going to the floor so I knew something wasn't right. Prior to this brake pedal going to the floor I was driving with a brake pedal that was stiffer and actually harder to push down. I had a very good feeling that the brake pads were worn so my Dad and I put in new ceramic brake pads and while I do seem to have braking power it seems like I have to really put some extra force to come to a nice quick stop. Otherwise I have to press on the brake pedal a 2nd time after pressing on it the first time because it does not come to a quick stop. I would also say that the brake pedal does go down quite a bit but I wouldn't say that it's going all the way to the floor. We did not replace the rotors because the rotors seemed to be fine. What do you guys think
