Acceleration Issue from stop/low speed

Tiny
ADADAD
  • MEMBER
  • 2017 LEXUS RX 350
  • 3.8L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 43,000 MILES
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/
Saturday, November 28th, 2020 AT 1:59 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
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
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Sunday, November 29th, 2020 AT 7:57 PM
Tiny
JIS001
  • MECHANIC
  • 3,411 POSTS
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.
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Sunday, May 16th, 2021 AT 1:18 PM

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