Acceleration Issue from stop/low speed

2017 LEXUS RX 350
43,000 MILES • 3.8L • 6 CYL • 4WD • AUTOMATIC
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ADADAD
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Car makes a loud rev sound from stop or low speed. Listen in attached video:

https://www.reddit.com/r/AskMechanics/comments/k2vsrm/2017_lexus_rx_350_fsport_loud_sound_during_low/
Nov 28, 2020 at 1:59 PM
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JACOBANDNICKOLAS
  • ASE Certified Mechanic
  • 110,194 POSTS
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Hi,

I watched the video. Is the sound you are referring to similar to a howling sound? It's really hard to hear it in the video. Is this something that just started or has it progressively gotten worse? Also, does it seem to have lost power or anything?

Here is a link you may find of interest. I'm adding it simply because I'm not sure if I'm hearing the noise in the video. Take a look through it to see if anything mirrors what you are experiencing.

https://www.2carpros.com/articles/engine-noises

Let me know.

Joe
Nov 29, 2020 at 7:57 PM
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JIS001
  • ASE Certified Mechanic
  • 3,412 POSTS
  • ASE Certified Mechanic
That almost sounds like a drone sound. There was a bulleting to replace the center pipe. It comes with a damper on it but all it does is minimizes the sound.

That drone sound is from the center pipe flexing. Also if you have loose exhaust bolts and nuts it will cause the center pipe to flex more making the sound more obvious. Let us know if the information helps resolve your issue.
May 16, 2021 at 1:18 PM
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