Thanks guys this is a new one for me. Everyone else was telling me that I needed to replace the ps pump or the rack.
Have any of y'all had this problem? I noticed that the car has to be moving at speed in order to hear anything and it's only at left turns. I'll also feel a slight vibration from the steering wheel.
My Mustang was doing the same thing as your car , the loud humming noise is from a bad wheel bearing , when you turn to the left , your shifting more of the cars weight to the right (the side with the bad W/B) , when you turn to the right your taking weight off the bad wheel so it goes away , thats why it comes and goes like it does .
My wheel made alot of noise but was tight as a drum , no wobble , shaking , no in and out play , and still my wheel bearing was toast !
Really easy fix , look in the
search, Type in
Wheel Bearing Problem ? and you will find how to replace it in detail !
Heres the basic info , take your caliper/rotor off , remove small hub cap , remove 35mm nut , pull off hub/bearing , install new hub/bearing(its all one part) install new 35mm nut (20$ from ford) torque down to about 258 foot lbs , install small hub cap , but your brakes and wheel back on , all done , there is a little more to it then this , but not much , really easy job !