ok i having a problem with my power steering it works when i add fluid but some how is leaking into my motor and starts smoking real bad till the fluid is gone any ideas

 

did u do a leak down test add some green dye to see if is leaking

 

there is no leaks any where lexus said somthing about pressure switch or air control valve but car runs clean till u add power steering fluid then it starts smoking really bad out of the exaust till the p/s fluid is dry