I have a 1999 LS400 and has been to the shop twice. It has approx. 117k and has a vibration when the throttle is between 1500-2200rpm, whether it is in park or going down the road in any gear. The left front motor mount has been changed and the vibration got worse and is still there. It is enough to drive you crazy while going down the interstate or just driving around town. If there is anyone with knowledge to this problem it would be helpful as both shops were unable to diagnose the problem.
-Thanks! Ryan
