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2021 Accord Touring
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Discussion Starter · #1 ·
Hi everyone, I am having this issue that I can't seem to get a dealership to acknowledge a rattle exists, and I'm hoping maybe someone has some insight as to what to look for next. The sound occurs right when I'm building boost and only during lower gears (2-5), gears past it seem quieter and I think I can hear it but I could be imagining it.

Link to video - happens around 3-4 seconds when I accelerate, there is a sound where it seems like something if smacking metal.

Things I have tried:

Removing the undertray metal shields and driving, did not change.

I had a Mishimoto catch can installed initally, and after removing it, the rattle is still present.

I've tried with AC on/off recirc on/off as well, sound persists, though it seems to be louder with the recirc off?

I have NOT yet tried removing the heat shield on the downpipe, don't know if I should and if it would be detrimental to leave it off if I did, but I have tried shaking it and it is tight, but I could be wrong.

The only thing that is not stock was the catch can, but that is removed now, as well as the upper motor mount being the 6MT one instead of the softer 10AT one. I have checked to make sure that mount is torqued correctly to spec. I'm really hoping it is not a turbo issue.
 

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I don't hear any rattle (but my ears aren't the best). Prior to hearing the rattle had you had any work done on the car, installed in new accessories? A lot of times starting in the area of the last thing done to the car will result in finding out what is causing an issue.
 

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Discussion Starter · #3 ·
I don't hear any rattle (but my ears aren't the best). Prior to hearing the rattle had you had any work done on the car, installed in new accessories? A lot of times starting in the area of the last thing done to the car will result in finding out what is causing an issue.
Only mods at the time before I noticed a rattle was a 6MT upper mount, Mishimoto intake, catch can and KTuner. Taken all but the upper mount off. Worried it might be a turbo issue from the Ktuner potentially, butI would think it would have popped a code if it was
 

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Discussion Starter · #5 ·
Can the noise be heard with the hood up and someone throttling the car up/down?
It's hard to get it to make the noise, since it happens around 3-4k RPM while its building boost. I did tighten the nut on the waste gate arm and it seemed to have helped a little bit/made it quieter. I poked around on civicx forums too and the common concensus is the wastegate actuator. Might just have to live with it :(
 

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Ok, gotcha. If you're like me now that you've heard it you'll be listening for it and hear it every time no matter how much it can be reduced... it would have to be gone to satisfy me. Good luck on getting it resolved and let us know if you do, and what you did to get rid of it.
 

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do you have stuff in cup holders/cubbies floating around? anything plastic/metal will make a surprising amount of noise due to no insulation in the pockets. same with sunglasses in the holder. those can make noise.
 

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Discussion Starter · #9 ·
do you have stuff in cup holders/cubbies floating around? anything plastic/metal will make a surprising amount of noise due to no insulation in the pockets. same with sunglasses in the holder. those can make noise.
Was not that, did eventually get it sorted, I guess I forgot to update here. My hood prop rod looked to be a bit extra loose, and would hit against a hose right below it, and went away after I wrapped it with some tape, and placed a piece of round foam around the hose below it
 

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Was not that, did eventually get it sorted, I guess I forgot to update here. My hood prop rod looked to be a bit extra loose, and would hit against a hose right below it, and went away after I wrapped it with some tape, and placed a piece of round foam around the hose below it
I have the same problem is it possible you can take a picture? I wrapped the hood prop with some tape and put a piece of velco on the hose where its touching the sound got less noticeable but is still there
 

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Hi everyone, I am having this issue that I can't seem to get a dealership to acknowledge a rattle exists, and I'm hoping maybe someone has some insight as to what to look for next. The sound occurs right when I'm building boost and only during lower gears (2-5), gears past it seem quieter and I think I can hear it but I could be imagining it.

Link to video - happens around 3-4 seconds when I accelerate, there is a sound where it seems like something if smacking metal.

Things I have tried:

Removing the undertray metal shields and driving, did not change.

I had a Mishimoto catch can installed initally, and after removing it, the rattle is still present.

I've tried with AC on/off recirc on/off as well, sound persists, though it seems to be louder with the recirc off?

I have NOT yet tried removing the heat shield on the downpipe, don't know if I should and if it would be detrimental to leave it off if I did, but I have tried shaking it and it is tight, but I could be wrong.

The only thing that is not stock was the catch can, but that is removed now, as well as the upper motor mount being the 6MT one instead of the softer 10AT one. I have checked to make sure that mount is torqued correctly to spec. I'm really hoping it is not a turbo issue.
Hey man i having the same issue did you find how to fix it ?
 
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