Weird Idle Noises
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Joined: Aug 2019
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C63 AMG
Weird Idle Noises
Hi Everyone,
Ever since I got a burble tune there's been a weird ticking noise on idle (please see the attached video) in my muffler. I always thought that my primary cat blew and the noise were pieces from the honey comb. I had a secondary cat delete so it's definitely not that. So recently I installed catless downpipes to hopefully solve this problem and nope it still ticks. They took out the original downpipes and the primary cats look almost new. Iv'e had the exhaust replaced because of the weird rattling noise a lot of people were having and they replaced it under warranty. I am now tuned with downpipes, so taking it to the dealer isn't exactly the best solution. To describe the sound, its like there's 3 or more mexican jumping beans bouncing around in my muffler.
Ever since I got a burble tune there's been a weird ticking noise on idle (please see the attached video) in my muffler. I always thought that my primary cat blew and the noise were pieces from the honey comb. I had a secondary cat delete so it's definitely not that. So recently I installed catless downpipes to hopefully solve this problem and nope it still ticks. They took out the original downpipes and the primary cats look almost new. Iv'e had the exhaust replaced because of the weird rattling noise a lot of people were having and they replaced it under warranty. I am now tuned with downpipes, so taking it to the dealer isn't exactly the best solution. To describe the sound, its like there's 3 or more mexican jumping beans bouncing around in my muffler.
Thread Starter
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Joined: Aug 2019
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C63 AMG
Thread Starter
Member
Joined: Aug 2019
Posts: 193
Likes: 31
C63 AMG
Update*
It could be a loose heat shield or bolt in the muffler. If it was the spark plugs I would of heard ticking from the engine. I'm taking it to a shop on Saturday to figure out what that damn noise is.
It could be a loose heat shield or bolt in the muffler. If it was the spark plugs I would of heard ticking from the engine. I'm taking it to a shop on Saturday to figure out what that damn noise is.
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Joined: Jan 2017
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W205 C63 S
Those are what I thought as well but it definitely does not sound like misfire to me. Also another thing it really sounds like is my previous car (w204 C300) when I did a resonator delete it also made the sound exactly like yours but only on cold starts and it was little bits of un-burnt fuel popping in exhaust. Not sure if it applies to you but just what I experienced. Please keep us updated! I'm thinking about getting DP and tune also but i heard so many people having little issues with their cars.
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Joined: Aug 2019
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C63 AMG
Quick Update:
Went to a tuner shop yesterday to see if the mufflers were loose causing it to rattle. Turns out it was my exhaust flaps the whole damn time. I find it weird though because my friends have the same car with the same tune with catless downpipes and their flaps don't make this noise. I'm going to bring in my car dealer and hopefully they don't flag it since it has a tune.
Went to a tuner shop yesterday to see if the mufflers were loose causing it to rattle. Turns out it was my exhaust flaps the whole damn time. I find it weird though because my friends have the same car with the same tune with catless downpipes and their flaps don't make this noise. I'm going to bring in my car dealer and hopefully they don't flag it since it has a tune.
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2019 AMG GT R
Quick Update:
Went to a tuner shop yesterday to see if the mufflers were loose causing it to rattle. Turns out it was my exhaust flaps the whole damn time. I find it weird though because my friends have the same car with the same tune with catless downpipes and their flaps don't make this noise. I'm going to bring in my car dealer and hopefully they don't flag it since it has a tune.
Went to a tuner shop yesterday to see if the mufflers were loose causing it to rattle. Turns out it was my exhaust flaps the whole damn time. I find it weird though because my friends have the same car with the same tune with catless downpipes and their flaps don't make this noise. I'm going to bring in my car dealer and hopefully they don't flag it since it has a tune.
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MY17 C63s Sedan
I want to chime in and say I was also having intermittent issues with my exhaust flaps. Although it is not a noise issue but it sometimes won't open. This in turn also caused an error code in the system. To remedy this, I went straight pipe -- problem solved. 
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Joined: Jun 2019
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From: Los Angeles, CA
2019 C63S Coupe, 2020 G550
I'm suffering from a rattling flap as well but it only comes when the engine is under load.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
MBWorld Fanatic!
Joined: Jul 2011
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2019 AMG GT R
I'm suffering from a rattling flap as well but it only comes when the engine is under load.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
tried to talk some sense in to them by trying to explain that a secondary cat delete has nothing to do with the valves but obv they wouldnt budge.
go to any exhaust shop and have them weld the valve permanently shut and plug in a simulator.
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From: Flat Earth
AMG C63s Sedan , AMG C43 , AMG G63 , GLK 250
I'm suffering from a rattling flap as well but it only comes when the engine is under load.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
To assume they will not look over the whole car, when its in, is not good.. they will do a FULL over on the car..
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Joined: Aug 2019
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C63 AMG
I'm suffering from a rattling flap as well but it only comes when the engine is under load.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
I have a secondary cat delete on my car. Would they even look and try to fix it seeing as I've messed with the factory exhaust?
I feel like it would be the perfect excuse for the dealer to avoid fixing it.
Thread Starter
Member
Joined: Aug 2019
Posts: 193
Likes: 31
C63 AMG
Cat deletes and DP's typically get noted and "flag" depending on your SA.. if you have a GREAT relationship with your SA and or Dealer, they might over look it..
To assume they will not look over the whole car, when its in, is not good.. they will do a FULL over on the car..
To assume they will not look over the whole car, when its in, is not good.. they will do a FULL over on the car..
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W205 C63 S
Does the flaps only apply to the performance exhaust or all exhausts?
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amg gtc 2020 bk
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W205 C63 S
Oh yes I got that, but the center console button only controls the valves in the muffler. I was wondering if the flaps that make the noise is from the muffler or the valved H pipe? I believe all C63 comes with Valved h pipe
