Brake pedal goes to the floor

Question:
95 chevy corsica has had the brakes changed, and master cylinder, and is still having problems stopping after driving several hundreds of miles. It just goes to the floor and does not want to stop Already Tried: changed brakes cleaned the rotors and master cylinder i do not know if this might have any relation to the anti lock system

Answer:
you are going to have to start by bleeding the brakes in the appropriate sequence and see where you stand from there. Make sure the rear brakes are adjusted properly. Many times by compressing the calipers the brakes need to be rebled. Follow the procedure below.


Remove master cylinder reservoir cover, then fill reservoir as necessary.
Attach one end of a clear plastic hose to rear bleeder valve of the brake control assembly, then put opposite end of the hose into a clean container.
While depressing brake pedal, slowly open bleeder valve, until fluid begins to flow.
Close valve and release brake pedal, then repeat procedure for front bleeder valve.
Ensure master cylinder is full, then raise and support vehicle.
Bleed wheel cylinders and calipers using the following sequence:

Right rear.
Left rear.
Right front.
Left front.
Lower vehicle and check fluid level in reservoir, fill as necessary.
Turn on ignition and note pedal travel and feel as follows:

If pedal feels firm and constant, start the engine and recheck pedal travel. If pedal still feels firm and constant, continue procedure.
If pedal feels soft or has excessive travel either initially or after engine is started, repeat bleeding procedure.
Road test vehicle, make several normal stops from a moderate speed, then make one or two ABS stops at approximately 50 mph.
Ensure pedal is still firm and constant.