[Vwdiesel] Caddy brakes

[Publius]

 I am having some issues with a Caddy :O


Hello

I have had a friend replace 80% of the brake part on my caddy; 
(1) wheel cylinder, both front calipers, and the master cylinder with new brake fluid.
He his not getting full pedal pressure?

He has tried to flush the brake line multiple times, and only gets some brake pressure on the pedal?



i have no clue why it wont hold pressure. 
it feels good, then it drops to the floor after a min or so. 
pump and its good then bleeds pressure again. 


anyone have any suggestions