I had the same problem. I did my own install with a champion kit in December and I learned how to bleed some brakes! I vacuum bled probably 2 qts of fluid through both sides. Still soft. I got a helper to pump the pedal and did it the old way,still soft. I was about to accept it and I thought I'd try one more time. (Days later). Had my help stand on the pedal one more time went to the farthest caliper cracked the top valve and one bubble came out. Now I can lock up the back wheels if I have to. So stay with it and it should work out