i have a 2001 Lexus gs 300 it was sitting in the pound for 8 months when i got it out the engine seems to be making a vibrating sound doesn't accelerate the same and vibrates when driven over 65mph the noise can be heard inside the car not really outside maybe it can be the engine not balanced right but im not sure im almost positive the sound is coming from the engine. if anyone knows anything i would appreciate your help