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Discussion Starter · #1 ·
So I noticed a weird knocking or clicking noise when I brake hard coming from underneath the drivers side floorboard. Almost like something is hitting something else. Car is brand new 300 miles on it. Anyone else experience this?
 

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So I noticed a weird knocking or clicking noise when I brake hard coming from underneath the drivers side floorboard. Almost like something is hitting something else. Car is brand new 300 miles on it. Anyone else experience this?
Yes, I had similar at about the 300 mile mark. The car was also stuttering a little when accelerating from a stop. I found out I wasn't using premium gas (apparently, a higher octane rating isn't the same as premium), so I switched to Shell brand, and the noise and stuttering both went away. I'm at 4,500 miles and it's still smooth and quiet. 🤞
 

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Discussion Starter · #4 ·
Yes, I had similar at about the 300 mile mark. The car was also stuttering a little when accelerating from a stop. I found out I wasn't using premium gas (apparently, a higher octane rating isn't the same as premium), so I switched to Shell brand, and the noise and stuttering both went away. I'm at 4,500 miles and it's still smooth and quiet. 🤞
Interesting I just filled up with regular gas like the dealer said too. What kind of gas do you use?
 

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Interesting I just filled up with regular gas like the dealer said too. What kind of gas do you use?
Also regular (87 octane), but only from Shell. I used Speedway and Kroger in the beginning, but like I said earlier, the car started coughing and making a tapping noise that drove us nuts.

Someone in one of the forums mentioned that not all gas brands are the same quality, so I did a little digging and found a list that showed Shell rated one of the highest in quality. I gave it a shot and it seems to have worked!
 

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Discussion Starter · #6 ·
Alright I used bp to fill up last time I guess I’ll try Shell on my next fill up. Was the knocking noise coming from underneath the drivers side for you as well?
 

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Alright I used bp to fill up last time I guess I’ll try Shell on my next fill up. Was the knocking noise coming from underneath the drivers side for you as well?
It was kind of nebulous, actually. At first, I thought it was the license plate frame rattling. I put some foam tape on the back, which didn't help, and had someone else listen from the outside while I drove through a parking lot. That person thought it was coming from under the driver's seat, but then it kind of sounded like it came from the rear axel, then back to the license plate area again. At no point did it sound like it was coming from the engine, which seems like the logical place for a fuel-related problem... But I don't know squat about cars, except how to make them go, so who knows. All I can say is: the problem seems to be gone! :D
 

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Discussion Starter · #8 ·
Correction to my previous post: I

It was kind of nebulous, actually. At first, I thought it was the license plate frame rattling. I put some foam tape on the back, which didn't help, and had someone else listen from the outside while I drove through a parking lot. That person thought it was coming from under the driver's seat, but then it kind of sounded like it came from the axel, then back to the license plate area again. At no point did it sound like it was coming from the engine, which seems like the logical place for a fuel-related problem... But I don't know squat about cars, except how to make them go, so who knows. All I can say is: the problem seems to be gone! :D
Alright sounds very similar to mine only thing your problem sounded like your noise was constant? Mines only when I brake moderately to hard. Brakes are working fine too. I’ll try the gas and see what happens. I’ll post the results here when I fill up thanks for responding. 👍🏻
 

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Alright sounds very similar to mine only thing your problem sounded like your noise was constant? Mines only when I brake moderately to hard. Brakes are working fine too. I’ll try the gas and see what happens. I’ll post the results here when I fill up thanks for responding. 👍🏻
Hey, there! Did you ever find out what was causing your knocking sound?
 

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Discussion Starter · #13 ·
Crazy part is that I checked under my seat but didn’t see nothing, but with a flashlight I saw it. Blows my mind the noise it made, it was driving me nuts. I was ready to call the dealer. Thanks you too!!
 
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