1992 Honda Accord Front end issues

I was giving this honda and when i took it for a ride, at low speeds the whole front end of the car jerks left then right as well the steering wheel does to. when i speed up the jerk gets faster and less noticeable but its still in the steering wheel...it goes left and pulls then right then left and so on i replaces ball joints and still the same ,,,,,,,also when i turn the wheel to the left at 30mph and over theres a knocking but only at a certaing point in the turn i need help thanks