I have an 88' crx with rear disk brakes. The car was off the road for approx 18 months. Now for the problem, when I push the brakes they go all the way to the floor. I attempted to pump the brakes to see if they were leaking somewhere and could not find a leak. I changed the rear wheel cylinders and bled all 4 brakes. I cant see fluid leaking anywhere. What should I do next to diagnose whats wrong? Any help is greatly appreciated.

 

If you aren't feeling any resistance when pressing the pedal down I'd check the master cylinder. The seals could be worn out and just letting the fluid pass by.