Hi, i bought a used 98' es300 about a year and a half ago from a lexus dealer and everything has been fine. i maintain it as it should and all that. Recently i noticed that when i accelerate the car, the rpm needle seems to run all the way to the red until i release the gas. I had the transmission fluid flushed as i thought that would solve the problem but the problem persists. The Lexus manual says that every 90,000 mi. the timing belt must be replaced...my car has 89,000 mi. right now. has anyone had this problem and if so, what is going on with my car?is there anything that must be replaced?