04 Rumble Bee 5.7
Replaced brake lines, and all calipers.
Bled all four calipers. No leaks.
Brake pedal still goes to the floor.
Any ideas?

 

You still have air in the lines.

 

Did you go longest to shortest and did you bleed the ABS pump?

 

<<Replaced brake lines, and all calipers.>>

A likely mistake is that you have installed the calipers on the wrong side of the truck. They fit and look fine, but the bleeders are at the bottom rather than the top. You'll never get the air out with that configuration, the bleeder must be at the top to get the air out of the caliper.

 

i replaced my master cylinder and when the truck us off the pedal is rock hard
if i let it sit and start it the pedal goes to the floor but after a couple of pumps on the pedal it gets hard
i have bleed it starting from the pass rear then driver's right then pass front then the driver's front till I could not see any more air coming out
from a clear tube to a bucket
yet i still have the same issue
the reason i replace the master is that the old master was doing the same and in the past the master was usually bad
i have a reverse bleeder tool that i am going to try

 

Reverse bleeder is going to push air into the abs system. You don't wanna do that.

You either have a leak, or there is still air in the system.

Knowing what you are driving wouldn't hurt here either.

 

Sorry 2003 Dodge 1500 2wd with 4 wheel ABS

 

Try a two-person bleed..... Have the person in the seat pump up the brakes, and HOLD the pressure, while you crack open the bleeder. Do that a couple times at each wheel, in the proper order. See if that doesn't change anything.