lamble

please help me if u can. i have a knock on the steering when i steer from centre slightly to the left. the wheel feels a bit looser for a fraction of a turn and there is a knock feeling. .is this down to a suspension problem or is it more to do with the steering rack/column? i also have terrible suspension as i feel every bump on the road and going over any major lumps or unavoidable pot holes is rather noticable. any suggestions welcome. :)