I have 77K miles on my '97 LX450, when I accelerate, I hear a whistling sound coming from the back area. After a few second and when I get up to a steady speed, the sound is gone. I had and independent reapir shop look at it and they said that it was something to do with the throttle assembly, and made some adjustment to the assembly and the whistling sound is still there. I had my 450 in the Lexus dealership this weekend for service and had them check out the whistling noise, the mechanic said that the noise is from the muffler.
Is there anyone else out there with the similar experience with the whistling noise?
Thanks
F.A.
