daddyduke

Hello everyone i need you guys input on this.I bought my dream car this February 2001 GS 430 126000 miles.when i opened the hood i noticed it was low on ps fuild so i put some in and it was the wrong kind.the next day the car steering got really stiff on me so i did a full flush with mobile one.after that the car ran great i mean awesome i was hoping in and out lanes fast and quick on the freeway.Couple days later it got stiff on me again.it feels heavy and i cant lane change like i wanna it feel as if i have no control over the car the feeling of the car is so heavy now.Nothing is leaking steering wheel self center like it supposed to. I cleaned the power steering reservoir still the same. I really need you guys help on this one I've been reading every post and im scared to change the rack and it drives the same but i think that i might do first can the rack cause the steering to become stiff one more thing when i start the car up in the morning it works about 75% like it should then 15 minutes its back to the same