I just put on a set of 3000gt dual piston front calipers, cross drilled slotted rotors, ceramic pads, braided lines, and prop valve out of a 1g diamante. I have bled 2 big bottles of dot 3 fluid through. Pedal gets nice and firm, but as soon as my car is running the pedal gets spongy. I try bleeding again and no air comes out. Any ideas? It wasn't like this before I got these brakes from DOHCstuner, and I don't want to go back to my stocks.