My 98 F-150 4x4 has experianced temporary power steering loss several times, at speeds between 20mph to 40mph. I have been to the dealer once and they could not find any problems. Could it be my power steering pump or a sticking valve? The last time it happened I almost ended up in the ditch. Thanks for any ideas or help. RkyMtnBama

 

The belt may be slipping, check it for wear!!

 

it prolly is the belt but also these PS systems move a lot of fluid and bubble and gurgle a lot and if the fluid is old/low an air bubble might have moved through the system.

 

I have the esp coverage on my truck but none of y'alls replies sound like warranty items. I will probably have my local mechanic check it out. I also have found the dreaded door crack, arggh!