mailipt Posted July 14, 2004 Share Posted July 14, 2004 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. Quote Link to comment Share on other sites More sharing options...
dougjohn Posted July 14, 2004 Share Posted July 14, 2004 Most likely from the exhaust. Do you still have taht funky looking little canister just before the end of the tail pipe? That unit is supposed to cancel/suppress a whistle that exists with the 450 exhaust. Could be that this canister is going bad? I have a friend with a Land Cruiser who replaced the exhaust on his '95. No canister now and he has a slight whistle. His solution? Turn up the stereo. Quote Link to comment Share on other sites More sharing options...
Andrewsreef Posted July 14, 2004 Share Posted July 14, 2004 Good info Dougjohn as I have the whistle also in my 97 LX450. Thanks Andrew Quote Link to comment Share on other sites More sharing options...
alanc Posted July 14, 2004 Share Posted July 14, 2004 My 96 LX450 also has the whistle. I get asked by passangers all the time what the noise is. I've heard that a new muffler will eliminate it for a while, but I'm not willing to spend the money. I'll go for turning up the stereo! Quote Link to comment Share on other sites More sharing options...
EnDLesS Posted July 15, 2004 Share Posted July 15, 2004 Yeah i agreed to the rear canister muffler, i had changed my exhaust system due noise from the back. If u want to spend something extra$$$ & and want look different than the other this company in overseas carry different kinda cat back exhaust system for 90-97 LC& LX450 (80 Series) The one i have on my 450 is the DY System which dual exhaust ~left &right side. in case u want to see what look like this the pics above; http://www.suxon.co.jp/4wd_index.htm http://www.shuei.co.jp/shopping/soup/soup.html http://www.shuei.co.jp/shopping/VERSION/version.html Good Luck~ Pro 450-470 Quote Link to comment Share on other sites More sharing options...
lx450owner Posted July 29, 2004 Share Posted July 29, 2004 I also have that anoying whistle on my 97 Lx450...... exact same problem.... whistles while accelorating then goes away when I hit a certain speed. I was also told that it had to do with the exhaust...... but turning up the volume works for me just fine. I knit-pick at every sound..... i hate sounds that shouldnt be there..... but in this case .... its not worth the financial trouble....... NOTE: Pink FLoyd will drown out the sound LOL Quote Link to comment Share on other sites More sharing options...
Chipofftheoldblock Posted July 30, 2004 Share Posted July 30, 2004 Same here....I think it is coming from a small hole I found in a joint near the muffler. Mine sounds similar to my M-B turbo diesel when it aspirates (when I let off the throttle) Quote Link to comment Share on other sites More sharing options...
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