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18 Sport - Engine/exhaust buzz - 3000-3500rpm?

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On my 18 Sport, I notice a buzz when the engine gets to about 3000-3500rpm.

I really feel it in my feet and it sounds like something is vibrating (like a panel or heat shield).

I did turn off the fake engine noise through Forscan and that seemed to reduce it, but that may have been my imagination.

 

I plan to get under the car (maybe this weekend) to check, but looking for any thoughts.

It's certified for another 10 months, so I could bring it to a dealer, but I'd like to know if it's common (or at least known).

 

Anyone else experience this?

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One common area is when one of the underbody closure panels sheads a fastener or two and vibrates against the body. Exhaust heat shields can also cause a buzzing. 

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15 hours ago, enigma-2 said:

One common area is when one of the underbody closure panels sheads a fastener or two and vibrates against the body. Exhaust heat shields can also cause a buzzing. 

 

Thanks for the input.

I heard about the fasteners before.

Some day I'll get under the car to look around. Too much time being spent on my other car projects.

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Figured I'd update this.

I did a quick check under the vehicle around where the driver's footwell is and tapped on the plastic panels under there.

I'm pretty sure it's one of the panels vibrating against the bottom of the sheet metal because when I tapped around, I could hear a slight buzz in a few areas.

One spot that was most noticeable was in the wheel well at the bottom where it looks like a couple panels are attached together with some plastic pins (or something like that).

I plan to get behind it and add some felt or rubber foam to dampen the sound.

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