Power Steering gear box acting crazy!!!

:wack:Just fired up my new engine in my Dart for the first time and my wheels turned to the left by themselves! I ran the steering wheel left and right a few times to bleed the air out and the wheel turns easy enough but it keeps returning to the left! Anyone know how to adjust this without tearing it back out of the car? I have never driven this car since I bought it so I don't know if this was a problem before or not.