help brake problems

well when i bought the truck i was having a very spongy brake pedal and it just seemed that it needed to be blead so while i was there i put new rear wheel cylinders on new drums and drum brakes i also up front put new brakes, rotor and i blead all the brakes starting with the farthest wheel away and i drove the truck for a week and it felt pretty good but 2 days ago i was driving and i had to hit my brakes pretty hard and the brake light and the ABS light on the dash came on and the pedal went to the floor i checked the brake fluid resivor and it is still full so i would only assume it is either the master cylinder or the ABS what do you guys think and if it is the abs i can just bypass that cant i and get rid of that all together i was planning on doing that anyways when i bagged it any suggestions is appreciated thanks

You can remove the abs. Its basically worthless anyways.

does it sound like that is the problem are is that a good starting place

sounds like the master to me if the pedal goes to the floor.. im almost 100 percent

My master cyl went out its was making a suction noise from the master cyl. does your pedal pump up if you pump it like your bleeding your brakes if not Its most likely you MS.

well if i pump it like i am bleeding it it does build up pressure so i think it might be the abs