Ok i am new to this forum. I gotta question might be dumb, but i am not sure. Ok sometimes when i am accelerating quick and when i am using the power etc button, that most toyota's and lexus comes with, after i do this a few times, when i try accelerating fast again, my engine doesn't do much, i will have the petal to the floor, and it will be acclerating but not fast at all, it wil be at about 2000 rpms, when usually it'll go to 6000 rpms and change gears when i have it floored. Any ideas of what is wrong?