I just replaced the LSPV and attempted to bleed the brakes. What happens is when I open the bleeders at the drums is it just spits out as if there is sooo much air in the lines. But, when I bleed the LSPV it shoots across the garage just as you'd expect. I was back and fort for about 40 minutes and the it didn't get any better at the drums. Put the tires back on and took it for a short drive down the street and back. The front brakes work like a champ - when I jam on the peddle the fronts lock up and it stops but I can feel that there is little to no back brakes.

I noticed that when the peddle is pumped, air bubbles come up from in the brake fluid resovior. I've been told a time or 2 that I need a new master cylinder.

Any ideas?