The brakes were so bad on one side that the caliper pistons pushed out so far and blew the seals and leaked brake fluid out of it. I was driving when the whole front brake system stopped working and i had to drive it about 15 miles with just the back brakes working only. So it has all new rotors, calipers,pads on both sides now. Then I started by bleeding the front only. Every time i pumped the brake pedal it would go down to the floor and it had some pressure but it would not come up quickly. it comes back up slowly. and when the truck is running there is absolutely no pressure in the brake pedal at all. And the front brakes are not engaging at all.

So what could be the problem

2000 dodge 2500 24valve diesel
bone stock

 

Sounds like to me that you still are getting air in the lines. Possible its time for a Master cylinder also.