Backfiring?
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Joined: Apr 2011
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'11 C63, '22 GLS 63, Porsches, M3, M4
Backfiring?
When I rev my c63 while in park, there's sometimes an explosive noise. Is this backfiring? What causes it? Does it reflect a problem with the car? Does it harm the car?
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Joined: Feb 2011
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From: Elk Grove, CA
2019 S63
Normal when cold. I caught up to my buddy when we left work one day and my car was still fairly cold. I wasn't getting on it, but I clicked off a manual downshift into second gear which resulted in a backfire with flames coming out the drivers side pipe from what my buddy said.
Thread Starter
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Joined: Apr 2011
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'11 C63, '22 GLS 63, Porsches, M3, M4
Normal when cold. I caught up to my buddy when we left work one day and my car was still fairly cold. I wasn't getting on it, but I clicked off a manual downshift into second gear which resulted in a backfire with flames coming out the drivers side pipe from what my buddy said.
Both times I had backfiring, the car was cold. I'll try again when the car's warm, and will report back on the results.
Part of what worried me was that I ran across several videos of people revving their C63s while parked, and there was never any backfiring. In several cases, the people had just started their cars, but of course that doesn't mean they were cold.
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Joined: Sep 2009
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From: Westchester, New York
09 C63
I have heard my car backfire all the time even when its not cold, if I come up to a stop sign or light after I been getting on it for a lil ill hear the popping and cracking of the car backfireing as it down shifts. I don't think are cars would have flames coming out the exhaust,(if there stock) because of the cats, and mufflers. I think...
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'11 C63, '22 GLS 63, Porsches, M3, M4
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Thread Starter
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'11 C63, '22 GLS 63, Porsches, M3, M4
I have heard my car backfire all the time even when its not cold, if I come up to a stop sign or light after I been getting on it for a lil ill hear the popping and cracking of the car backfireing as it down shifts. I don't think are cars would have flames coming out the exhaust,(if there stock) because of the cats, and mufflers. I think...
The sound I'm referring to is fairly loud and explosive, to an extent that probably most people would find worrisome.
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From: Westchester, New York
09 C63
No don't get me wrong the sound is better then anything that comes out the B/O...but mayby its just the blipping and burbling, I look foward to that everytime I come to a quick stop lol
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From: Poole, U.K.
2011 C63 AMG
Nothing to be confused about. Hot or cold it dosen't matter. It's what they do.
Due to the nature of it being a high performance, and considering it's size, high revving engine, what you are hearing is the unburnt fuel igniting in the exhaust.
This is an old video, but listen to what happens when the car goes into over run (foot off throttle).
Oh yeah, turn up the volume too.....
http://www.youtube.com/watch?v=FwCwMRDjWGI
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From: Kingdom Of Saudi Arabia
2011 C63AMG P31
I have the blipping burbling but some time I hear explosive when down shifting in high RPM
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'11 C63, '22 GLS 63, Porsches, M3, M4
This is an old video, but listen to what happens when the car goes into over run (foot off throttle).
Oh yeah, turn up the volume too.....
http://www.youtube.com/watch?v=FwCwMRDjWGI
Oh yeah, turn up the volume too.....
http://www.youtube.com/watch?v=FwCwMRDjWGI
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From: Poole, U.K.
2011 C63 AMG
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2010 C63, 2014 E63
Normal when cold. I caught up to my buddy when we left work one day and my car was still fairly cold. I wasn't getting on it, but I clicked off a manual downshift into second gear which resulted in a backfire with flames coming out the drivers side pipe from what my buddy said.
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From: Desert
02 CLK 55 AMG,09 C63 loaded with P30
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From: UG
2013 ML63 AMG PP
http://www.youtube.com/watch?v=Je-scgFJGBc
At the 4 second mark you can hear a small backfire. Car was hot and idling because I just reached home and decided to record it.
Now for those of you who wish to hear the 'big one' at your beck and call then you need to downshift (while in Manual mode) from 4th gear to 3rd gear while slowing down with the rpms coming to, or at 3,000rpm on the tacho. It's also possible around 2,500rpm when slowing down from 2nd gear to 1st, though not as loud but a at a much slower speed. Play around with the rpms around those respective marks/gears. The loudest is the 4th to 3rd gear though! :-)
At the 4 second mark you can hear a small backfire. Car was hot and idling because I just reached home and decided to record it.
Now for those of you who wish to hear the 'big one' at your beck and call then you need to downshift (while in Manual mode) from 4th gear to 3rd gear while slowing down with the rpms coming to, or at 3,000rpm on the tacho. It's also possible around 2,500rpm when slowing down from 2nd gear to 1st, though not as loud but a at a much slower speed. Play around with the rpms around those respective marks/gears. The loudest is the 4th to 3rd gear though! :-)
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'11 C63, '22 GLS 63, Porsches, M3, M4
OK, you guys have convinced me that backfiring is normal for this car (and other sports cars), and nothing to worry about.
And now we know that the C63 is literally a fire-breathing car!
And now we know that the C63 is literally a fire-breathing car!
