My LS 460 07 , did have slight hesitation under moderate acceleration. It always performed well floored. recently the hesitation got so bad
the car was almost undriveable . My wife called and got the Lexus dealer to pick the car up, she was uncomfortable driving it. well , we got the car back in about 3 hours ,,,, they flashed the computer, which was not communicating correctly with engine, and I must say the car run like a different car now. i took it for a spin and its totally awesome.I cant wait to floor it on my favorite road, ( one thats safe to speed on ). Call
and have yours done ,, its TSB Technical Service Bulliten, so there no charge. Good Luck.