My 90 accord has a big steering problem. While driving if my foot is on the gas, the car will turn smoothly, but if I take my off the gas need all my strength just to turn a corner. Why is the car doing this? Also, when the car is turned the motor shakes very bad but if my foot is on the gas it stops doing it. There are not engine lights on or anything. What is the cause of this?

My 90 accord has a big steering problem. While driving if my foot is on the gas, the car will turn smoothly, but if i take my off the gas need all my strength just to turn a corner. Why is the car doing this? Also, when the car is turned the motor shakes very bad but if my foot is on the gas it stops doing it. There are not engine lights on or anything. What is the cause of this?
To add to this: when turning the steering wheel to the right it is normal but it is hard when turning to the left. Also when first turning the car on steering will turn left then all the way right by itself.