The PS pump in my wifes Daewoo (I know, I know...) was going bad on us. It would be hard to turn the wheel unless you gave the engine some throttle, then the steering would be like normal. Well her car has the variable assist, so I got curious and unplugged the solenoid and took it for a spin. I agree with rock about the having the steering tighten up at speed - just not 150 in a Daewoo, lol. Anyways, it felt fine at idle again, but when going down the road at 50, the steering was way to easy to turn, and I felt if she tried to make an emergency maneuver at that speed, she would probably end up going off road, something even my Ranger doesn't really do (yet), so I plugged it back in. The reason I did this was to see if it would be an easy alternative to make parking lot life easier until I got a different pump, but thought it was too unsafe like that to leave, that and she's a good cook so the solenoid got plugged back in until I got the new pump.