Try this: pump up the brakes. Does it stay solid after they're pumped?
Now back up and stop. Does it need to be pumped up again before you get full pedal? Does it stay solid once you do though?
Pull forward. Same quiz. Does it take an extra pump?
If so, it can be pad knock back. My brake kit did this too. I snugged up my front wheel bearings some more and it helped, but didn't completely go away until everything broke in real good.
