isis hydro in a z33
 

I recently bought a new Isis hydro for my 350z and when putting it in I assumed (first mistake) it was like a 240 and you could cut into factory lines and feed it from there. Wrong. So after countless hours of replacing the cut brake lines, I went by a DIY'er on here like myself and got braided lines and hooked them up the right way and swapped the right lines at the abs block I figured this looked right. So I bled, and bled, and bled. Just drove it and my pedal goes to the floor practically. And my hydro will build pressure then lose it like theres a leak. But there isn't. Master level is still the same and there were no spots on the ground from possible leaks. The only thing I haven't done is bleed the hydro itself mainly because I don't know how other then to take the lines back off and physically pump fluid into it so there is no air. So what am I missing here? Any guidance at all would be appreciated. Mixed up lines where I had to redo them? Not sure.