Power Steering

I have a major problem with power steering. Can someone help?? When we start the car and barely touch the wheel the power steering turns by it self towards the right and puts up a fight going to the left. We just replaced the control valve hoping to fix the problem. No luck the problem still exists. Can someone help?? Thanks

Hi, I have a 67 Mustang with similar problems that you experienced and I was wondering if you have found the problem and could offer me some advice.
-Thankyou