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No backfire on my 2019 C63s coupe after changing the catback

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Old Jul 30, 2019 | 08:38 PM
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James Clay's Avatar
James Clay
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C63s
Angry No backfire on my 2019 C63s coupe after changing the catback
I bought a 2019 C63s coupe this year, I was not satisfied with the stock sound after 4000 miles and then I decided to change the catback to FI exhaust. When I finished the installation and tried the sound, it was loud and had backfire when I run the car to 4500 rpm, while the stock has to go up to 5000-6000. I was so satisfied that day. However, after that day, the backfire disappeared!! I don't know what happened, could anyone help me with this? Should I give up the FI exhaust?
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Old Jul 30, 2019 | 09:14 PM
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2017 AMG C63
Yes. If you want your good sound back.
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Old Jul 30, 2019 | 09:54 PM
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But the sound now is good and much louder than the stock and had the backfire when I finished the installation. It just disappeared after that day
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Old Jul 31, 2019 | 06:07 AM
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2019 C63WS
Did you get a tune?
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Old Jul 31, 2019 | 10:58 AM
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Not yet, it will affect the warranty so I didn't do that
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Old Jul 31, 2019 | 12:44 PM
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munis
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2021 Mercedes C63s AMG Coupe
The ECU probably calculates back pressure for determining the overrun on lift off. In this case, the lack of resistance is probably throwing it off.
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