Buzzing sound under throttle [cross posted under Engine as well]

[BluePAZ]

I've noticed a buzzing sound while under throttle in my ITS. I've found on a CTR forum someone who posted about having the same issue and posted a video of the sound (linked below). Although seemingly there wasn't a definitive answer of if it was normal or not. Does anyone else notice the sound or should I bring it into the dealer?

https://www.civicx.com/forum/threads/buzzing-sound-when-accelerating.64122/

 

[Justryin]

I’ve noticed something odd if holding around 3k rpm ill see if i can replicate it not sure. I believe the motor timing changes when letting off the gas im thinking its something with that but im no mechanic

 

[Wilber158]

I have the same noise as well, I’m currently in the middle of trying to get the dealer to figure it out. I’m 90% certain that it’s the speaker that’s having the issue. For me it’s the passenger side. Dealer won’t budge though claiming they can’t replicate it.

Do you have any updates?

 

[optronix]

There are many, many threads on this topic. The consensus is that it's the electronic wastegate actuator, and the noise is very common with the K20C engines and apparently is very normal.

This thread has a video where it is duplicated in the best way I've seen. The guy put a microphone IN THE ENGINE BAY. Lots of extra valvetrain noise but you can clearly hear the "cymbal" noise as some folks have described it:

https://www.civicxi.com/forum/threads/waste-gate-rattle-noise.52416/

Some folks claim they've never heard the noise, some folks claim they have 30k+ miles on their FK8 and it still makes the noise. Personally, I noticed my car making this noise about 200 miles in, and it drove me nuts for a couple weeks until I just didn't notice it anymore. I can still duplicate it occasionally but I think it's gotten quieter over time... or I mentally just tuned it out.

Dealers likely won't be able to help at all because the noise is hard to replicate for anyone who doesn't drive the car every day, and if it is the wastegate they'll tell you it's normal.

 

[Wilber158]

There are many, many threads on this topic. The consensus is that it's the electronic wastegate actuator, and the noise is very common with the K20C engines and apparently is very normal.

This thread has a video where it is duplicated in the best way I've seen. The guy put a microphone IN THE ENGINE BAY. Lots of extra valvetrain noise but you can clearly hear the "cymbal" noise as some folks have described it:

https://www.civicxi.com/forum/threads/waste-gate-rattle-noise.52416/

Some folks claim they've never heard the noise, some folks claim they have 30k+ miles on their FK8 and it still makes the noise. Personally, I noticed my car making this noise about 200 miles in, and it drove me nuts for a couple weeks until I just didn't notice it anymore. I can still duplicate it occasionally but I think it's gotten quieter over time... or I mentally just tuned it out.

Dealers likely won't be able to help at all because the noise is hard to replicate for anyone who doesn't drive the car every day, and if it is the wastegate they'll tell you it's normal.

Hey thanks for your input. You’ve put my mind at ease. I compared it with the noise I recorded coming from the speaker and it’s the same. Sometimes it just drives me insane, sometimes I don’t notice it.

Now I need to fix the rattle in my panel that came after the dealer popped it open to check a different rattle…

 

[StingertimeNC]

I had buzzing last week. Turns out it was my sunglasses rattling around in the overhead bin. If I put them in one way, it ratttles, flip them around and it's quiet. Just throwing it out there. It also sounded like it was coming from the passenger side.

 

[ST675R]

I had buzzing last week. Turns out it was my sunglasses rattling around in the overhead bin. If I put them in one way, it ratttles, flip them around and it's quiet. Just throwing it out there. It also sounded like it was coming from the passenger side.

I've had the same rattle and lined the sunglasses holder with felt tape. It didn't really help. Learned that its the actual glasses vibrating and not a vibration against the holder.