Power steering question

[fishface]

Hi all, I have a new Chassisworks rack and a Concept One pump. I bled the pump as per their instructions, engine off and 20 turns lock to lock. a few very small bubbles that seemed to clear up. When I start the engine the steering has a slight jerky feeling to it. I double checked the lines and everything is tight with no binding. Any ideas what might cause this?? Any help greatly appreciated.