when i had my 2000 t/a i started having an overheat problem and i couldnt figure it out for the life of me. replaced the radiator cap, flushed the system, replaced the t stat, and checked the fans and seemed to be working fine. so i bit the bullet and took it to a shop, and guess what, my high speed fans werent working so at temps above 210 i had no cooling fans, just my low speed fans. maybe check those out, if not then maybe you have clog in your system.