Jleez099

Hi All,

I apologize in advance if this post is elsewhere within the RCF community. I've searched and I only came across a thread within the ISF community that this issue came up in and it's quite dated. Link below if anyone is interested in reading...

​https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.clublexus.com/forums/is-f-2008-2014/758705-low-cyclical-humming-noise-at-70-mph-any-clues.html&ved=2ahUKEwibi9Ge36_fAhUOLKwKHfjsCMkQFjAAegQIBRAB&usg=AOvVaw3G_FVK0PCakIeg9vCw0yR8

So I have been hearing some faint cyclical humming/buzzing noise at around 70 to 75mph within the cabin.. can't really pin point the source. I can make the noise slightly more noticable on Sports+ mode with manual on 8th gear. I think it's because of the amplified engine noise from the speakers?

A quick history of the car:

• Bought 2016 Certified Pre-Owned @ Sewell Lexus 11/1/18
• Had 2,800 miles and driven another 2,200 miles
• No mods that I am aware of.
• Previous owner was a Lexus employee. One of the "fleet cars" from what I was told.
• Performance package
• In April, 2018 had the fuel pumps replaced. I made sure to ask for all service records. Service records also shows in June, 2016 "customer had asked for a ECM software evaluation" and all they did was just that. No resets or anything.
• I try to use Shell gas as much as I can but this past month I've used Texaco, Chevron as well.

There is a high possibility that it could just be the tires. However, these are the stock tires and just by visually looking at them, I do not see any uneven wear. I might be paranoid but I'm hoping this has nothing to do with the fuel pumps. From reading about the fuel pump issues, it looks like it was making the noise when the car is on idle vs the noise at 70+ mph.

I would love to swap out my wheels with new tires and see if the noise persist but that purchase won't happen until another 6 months or so (Saving up for them). I just hope that this noise is normal and it won't cause any problems internally.

All I can think of is maybe the tires were damaged during the TX summer months as it had been sitting in the dealership's lot for quite a while. Service records also show that Park Place Lexus did a multi-point inspection in October, 2017 when it had around 2,400 miles and the low tire pressure light was on "per customer". (I'm guessing this was when the car was returned?)

Has anyone experienced anything like this before on the RCF?

Thank you all!

J.

TLDR
Car makes humming/buzzing noise at above 70mph. Fuel pumps were replaced April, 2018. Car had been sitting in the dealership lot for quite sometime before purchasing. Could be damage to the tires or could be the fuel pump showing signs of struggle? Or could be me going bat **** crazy.

Burch_RCF

Jleez099

You're right, I went on to buy this car since it's LCPO and Sewell has a pretty good reputation so I don't think they would put their name on the line doing anything shady.

Just this noise is driving me crazy... It might just be me. I'll swing by Sewell later today to see if I can replicate it with one of their techs in the car.

Thanks for your input!

05RollaXRS

Is it your rear fuel pump? The known issue for which a TSB is out. You will have to get your ECU reflashed.