It just started making trouble by the steer wheel jerking back and forth on me when I am driving. Usually the scare gets me when I may be going at any speed, but take my foot off of the pedal and brake it can make it worse. If I stop for a few minutes, it will quit, then for no reason, and at no particular time, it can or will start doing it again. I have checked everything, idol silinoid switch, power steering, tires rotated and reblanced, and just recently had the water pump replaced. it did this all before the work had been done, but does it worse now since i got it back.