Has anyone heard of the following? After making a turn the front wheels do not return to the home position. I have to hold the steering wheel to the left a little. After a few yards of driving straight the wheels will automatically return home allowing the steering wheel to be centered again. Also, while making a right hand sweeping curve to an interstate on ramp, the car will under-steer by itself, causing me to counter-steer to avoid running off the road. I randomly get the power assist failure in my information display but have not lost power steering yet. If I get a new rack & pinion installed would it take care of both problems? Are there 2 separate problems here?