Please help! Humming noise when accelerating.
Thread Starter
Driver School Candidate
Joined: Oct 2008
Posts: 17
Likes: 0
From: Ulaanbaatar
Please help! Humming noise when accelerating.
Hello everyone.
I bought used rx350 2007 MY (actual date is 2006.03). I have a problem with car. When i pressing gas pedal the car starts humming, as soon as i let off foot from gas pedal the humming noise is goes away. My car has All wheel drive. All wheel bearings were changed. Car has 114000 miles on it. Dealers and services can't diagnose this problem. Do you guys have any idea, what can cause the humming noise?
Thank you
I bought used rx350 2007 MY (actual date is 2006.03). I have a problem with car. When i pressing gas pedal the car starts humming, as soon as i let off foot from gas pedal the humming noise is goes away. My car has All wheel drive. All wheel bearings were changed. Car has 114000 miles on it. Dealers and services can't diagnose this problem. Do you guys have any idea, what can cause the humming noise?
Thank you
Last edited by zig; May 13, 2013 at 10:34 PM.
1st Gear
Joined: Feb 2019
Posts: 1
Likes: 0
From: Abu Dhabi
Hello everyone.
I bought used rx350 2007 MY (actual date is 2006.03). I have a problem with car. When i pressing gas pedal the car starts humming, as soon as i let off foot from gas pedal the humming noise is goes away. My car has All wheel drive. All wheel bearings were changed. Car has 114000 miles on it. Dealers and services can't diagnose this problem. Do you guys have any idea, what can cause the humming noise?
Thank you
I bought used rx350 2007 MY (actual date is 2006.03). I have a problem with car. When i pressing gas pedal the car starts humming, as soon as i let off foot from gas pedal the humming noise is goes away. My car has All wheel drive. All wheel bearings were changed. Car has 114000 miles on it. Dealers and services can't diagnose this problem. Do you guys have any idea, what can cause the humming noise?
Thank you
Driver
Joined: Apr 2022
Posts: 82
Likes: 13
From: California
think I have it too
2009 with 155K miles. Near perfect in all ways. No other noises except this same sort of hum which sounds like maybe differential and or trans. Maybe all of our 4WD cars make this noise even from new? It is that sort of bad wheel bearing noise but my bearings are fine. I am guessing a worn part in trans/diff arena. Someone must know the prob and knows the fix too.
Rookie
Joined: Sep 2012
Posts: 31
Likes: 2
From: CA
Anyone figure this out ? Bought a 2008 recently and did full tune up, trans fluid and differential. 1st i thought it was something i did that caused it but seem not. Can't tell when bought due to bad decoupler from alternator causing squeals. Once that solved, now I can hear the humm only during acceleration but no hum when let go of acceleration at high speed. Everything seems normal but hummmm kills me
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Driver
Joined: Apr 2022
Posts: 82
Likes: 13
From: California
i can only hear mine...
at between 20 to 30 mph with radio off and no wind noise. it goes in and out as i either coast or apply a bit of gas. prob making the noise at higher speeds too but the car runs so quiet and smooth at highway speeds i have no issue with it. at 155K miles i could guess some wear part (bearing) in the trans/diff is the culprit. not terrible just wondering the cause.
Anyone figure this out ? Bought a 2008 recently and did full tune up, trans fluid and differential. 1st i thought it was something i did that caused it but seem not. Can't tell when bought due to bad decoupler from alternator causing squeals. Once that solved, now I can hear the humm only during acceleration but no hum when let go of acceleration at high speed. Everything seems normal but hummmm kills me
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Pit Crew
Joined: May 2007
Posts: 145
Likes: 13
From: FL
Have you replaced the alternator recently? In my RX, there is an alternator whine (not hum). It is an electrical noise. My RX300 still does that. I think changing to a 130 Amp Alternator will solve it for me. The one I bought from NAPA was 100Amps.
Intermediate
Joined: Nov 2017
Posts: 489
Likes: 30
From: Montreal, QC
Hmm this is interesting. As mentioned, it really is when accelerating, correct? When gas is let go, the sound goes away? Can maybe a dirty fuel injector cause this?
the bad mount idea may be a possibility... as when you accel... it causes the engine to move.
the bad mount idea may be a possibility... as when you accel... it causes the engine to move.
Rookie
Joined: Mar 2023
Posts: 40
Likes: 1
From: CA
I also have a video here so you can hear the sound: https://www.2carpros.com/questions/c...-the-gas-pedal
Rookie
Joined: Mar 2023
Posts: 40
Likes: 1
From: CA
Last edited by GotHeem; Jun 22, 2023 at 01:57 PM.
Intermediate
Joined: Nov 2017
Posts: 489
Likes: 30
From: Montreal, QC
Hmmm ok? What kind of hesitation? I'm curious now. I had my tranny rebuilt last year. I notice usually when "crawling " in traffic, at around 15-20km/h...if i slowly accelerate, the revs slowly go up but car isn't really moving, then it upshifts and shifts well. If i come to a complete stop, though, and accelerate, it shifts through the gears perfectly.
off had, do you know where all the mounts are located? I can check mine out.
off had, do you know where all the mounts are located? I can check mine out.