Flapping sound when over 5K RPMs

Leingod · 12-19-2015, 12:36 PM

Quote:

Originally Posted by Duc_Z09

That would implicate the undertray since you have to remove and replace it to do an oil change. I'd think a loose undertray would react more to speed rather than rpm though.

Correct. But the undertray was tight beforehand. The sound was coming above the undertray.

Quote:

Originally Posted by Bad Boy

Can you look at the video and see if this is still similar to your previous issue?

Same exact sound. It's definitely in relation with RPM and not speed. It hasn't hurt my car at all that I've seen. So don't worry to much about it. It is an annoying sound though. If mine comes back when I pull mine out of storage in the spring, i'll start tearing stuff apart.

Bad Boy · 12-19-2015, 12:51 PM

Quote:

Originally Posted by Leingod

Correct. But the undertray was tight beforehand. The sound was coming above the undertray.

Same exact sound. It's definitely in relation with RPM and not speed. It hasn't hurt my car at all that I've seen. So don't worry to much about it. It is an annoying sound though. If mine comes back when I pull mine out of storage in the spring, i'll start tearing stuff apart.

Yeah I just checked the undertray and it seems nice and tight. Nothing looks loose. And when I rev up to the limit, 5K, no noise.
Since you said it went away on its own, ima stop stressing out with the dealer and just let it be for now.
I guess the only sure way to know what it is, is for something to actually/fully break.

Leingod · 12-19-2015, 01:12 PM

Quote:

Originally Posted by Bad Boy

Yeah I just checked the undertray and it seems nice and tight. Nothing looks loose. And when I rev up to the limit, 5K, no noise.
Since you said it went away on its own, ima stop stressing out with the dealer and just let it be for now.
I guess the only sure way to know what it is, is for something to actually/fully break.

Yea. Don't worry to much about it. About 3-4 months after I drove the car is when it went away. I did a few hard launches and shift changes during those times.

Bad Boy · 12-27-2015, 01:50 AM

Quote:

Originally Posted by Leingod

Yea. Don't worry to much about it. About 3-4 months after I drove the car is when it went away. I did a few hard launches and shift changes during those times.

Looks like you were right... After just about a week of my "normal" driving, it seems that the noise has just gone away.
I feel like there might be something loose behind the dash or something. Oh well. No noise anymore.

Chuck33079 · 12-19-2015, 01:51 PM

Quote:

Originally Posted by Bad Boy

Yeah I just checked the undertray and it seems nice and tight. Nothing looks loose. And when I rev up to the limit, 5K, no noise.
Since you said it went away on its own, ima stop stressing out with the dealer and just let it be for now.
I guess the only sure way to know what it is, is for something to actually/fully break.

Actually, you should take the undertray off and have a look before you assume everything is ok. Just because it doesn't happen when the vehicle is stationary and revving doesn't mean there isn't something contacting when the car is moving and at high rpm.

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