Hesitation/stutter at 5k rpm, at 50-80% throttle
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2016 C63S
Hesitation/stutter at 5k rpm, at 50-80% throttle
I've noticed this problem for about a year now since I got my tune but I've finally had it and was curious if anyone else has seen or experienced this.
The issue is that, at moderate throttle but NOT at 100% (so, say 50-80%...enough to make the car go at least to 5k rpm above before shifting), I will get jerky stuttering and hesitation at about 2 or 3 times.
For example, if I'm on a highway doing 60 and want to pass someone, and give the gas enough of a push to shift down to third and accelerate quickly (again, not flooring it), when third gear hits 5k rpm, the car will start bucking a few times. Similarly, if I am driving on a back road and put the car into S2 and moderately accelerate, again at 5k rpm and above, the car will buck between one and a three times.
It is definitely noticeable physically and audibly (I've had passengers ask me what the heck is wrong with my car on several occasions). It is also definitely not ESC/TCS because, again, this does not happen at 100% throttle, only partial. Also, no ESC light and this is happening at 70-80 mph on the highway example, above.
Here is a video link where you can see it happening in my S2 example I mentioned. It's actually easiest to hear it, but you can also notice the needle slow down twice if you watch very closely. You will hear two hesitations, one right before the gauge hits 5k and one right before 5.5k. You can also notice my phone lurching as it happens since acceleration is cutting out.
FYI I have started talking to the tuner last night, and he will be getting back to me, but I figured I'd see if this is an isolated incident in the meantime.
http://www.youtube.com/watch?v=TTPKX...ature=youtu.be
The issue is that, at moderate throttle but NOT at 100% (so, say 50-80%...enough to make the car go at least to 5k rpm above before shifting), I will get jerky stuttering and hesitation at about 2 or 3 times.
For example, if I'm on a highway doing 60 and want to pass someone, and give the gas enough of a push to shift down to third and accelerate quickly (again, not flooring it), when third gear hits 5k rpm, the car will start bucking a few times. Similarly, if I am driving on a back road and put the car into S2 and moderately accelerate, again at 5k rpm and above, the car will buck between one and a three times.
It is definitely noticeable physically and audibly (I've had passengers ask me what the heck is wrong with my car on several occasions). It is also definitely not ESC/TCS because, again, this does not happen at 100% throttle, only partial. Also, no ESC light and this is happening at 70-80 mph on the highway example, above.
Here is a video link where you can see it happening in my S2 example I mentioned. It's actually easiest to hear it, but you can also notice the needle slow down twice if you watch very closely. You will hear two hesitations, one right before the gauge hits 5k and one right before 5.5k. You can also notice my phone lurching as it happens since acceleration is cutting out.
FYI I have started talking to the tuner last night, and he will be getting back to me, but I figured I'd see if this is an isolated incident in the meantime.
http://www.youtube.com/watch?v=TTPKX...ature=youtu.be
Thread Starter
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2016 C63S
Thread Starter
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Joined: Dec 2011
Posts: 557
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2016 C63S
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2016 C63S
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C63 AMG
My car used to do this heistation/surge and then I got a check engine light that would go on and off. I took it to the dealer at it turned out to be a intake manifold gasket leak (you might also want to have them check the purge valve). The error codes that would come up were P0451 and P2187. My car has a Eurocharged tune and I am running BMC filters, but kept the charcoal ones in because after I took them out the check engine light came on about 30 miles later.
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I had a "stutter" or what I would describe as a slow shift (which causes my head to buck a little) when it shifts about 4500-5000 RPM and about a 50%-80% pedal input as you described. Did not have the problem when I fully depressed the pedal. Clld the tuner and new tune does not have that effect. Tuner did ask me to check the MAFs since I had K&Ns but that did not turn out to be the issue. I did not have any codes/CEL. Sounds like you have the same issue I had.
What tune are you running?
PS-Agree with CLS55, hard to see in video especially with the glare.
What tune are you running?
PS-Agree with CLS55, hard to see in video especially with the glare.
Last edited by Sincity; Aug 15, 2013 at 02:06 PM.
Thread Starter
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2016 C63S
I had a "stutter" or what I would describe as a slow shift (which causes my head to buck a little) when it shifts about 4500-5000 RPM and about a 50%-80% pedal input as you described. Did not have the problem when I fully depressed the pedal. Clld the tuner and new tune does not have that effect. Tuner did ask me to check the MAFs since I had K&Ns but that did not turn out to be the issue. I did not have any codes/CEL. Sounds like you have the same issue I had.
What tune are you running?
PS-Agree with CLS55, hard to see in video especially with the glare.
What tune are you running?
PS-Agree with CLS55, hard to see in video especially with the glare.
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2016 C63S
Not quite a drop. Just a hiccup. Like if you were to flutter the gas pedal like a wawa guitar pedal. Press-lift-press-lift. It happy so fast that RPM's don't decline, they just stop rising for the time that you can hear the blurbs in that video (happens twice both within the 0:03 second of the vid). You are correct that it has nothing to do with shifting.
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2016 C63S
Brief update that putting the carbons back in did not help. Removing the tune did. Car is butter smooth in stock form. Very frustrating.
I am talking with the tuner now and got a new file to try, but I have my doubts that anything will work. Feel like I need in-person tuning help for this issue, and unfortunately the Philly area doesn't seem to get many frequent visits from the flash loader tuner guys.
I am talking with the tuner now and got a new file to try, but I have my doubts that anything will work. Feel like I need in-person tuning help for this issue, and unfortunately the Philly area doesn't seem to get many frequent visits from the flash loader tuner guys.
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my wife bananas! :D
Brief update that putting the carbons back in did not help. Removing the tune did. Car is butter smooth in stock form. Very frustrating.
I am talking with the tuner now and got a new file to try, but I have my doubts that anything will work. Feel like I need in-person tuning help for this issue, and unfortunately the Philly area doesn't seem to get many frequent visits from the flash loader tuner guys.
I am talking with the tuner now and got a new file to try, but I have my doubts that anything will work. Feel like I need in-person tuning help for this issue, and unfortunately the Philly area doesn't seem to get many frequent visits from the flash loader tuner guys.
i found after my tune, the car shifts flawlessly and can feel power throughout the gears
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2016 C63S
Feel free to PM if you'd rather.
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2016 C63S
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Kleemann. Cory has been very helpful in getting it resolved (not saying that Jeremy and Jerry not doing the same since they are both responsive). His programmer looked at the file several times and didn't see anything different (canned tune) and didn't know why it would cause my issues. The new file I have is reportedly not as powerful though I haven't been on a dyno. Cory never did tell me what parameters they changed. I'm running K2.
Last edited by Sincity; Aug 16, 2013 at 07:04 PM.
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'08 C63, '10 GT-R
I have this exact same problem as you ezatnova!!! However, my car is currently running the stock tune with K&N intakes and charcoal delete. It's been happening for a few months now, and within these few months I have taken it to the dealer, and the problem is still present. The dealer had changed by purge valve and resealed my leaking intake manifold but the problem persists. I'm glad you found your solution which was to change the tune back to stock, but I am on a stock tune, wonder what causes these hesitations?
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2016 C63S
I have this exact same problem as you ezatnova!!! However, my car is currently running the stock tune with K&N intakes and charcoal delete. It's been happening for a few months now, and within these few months I have taken it to the dealer, and the problem is still present. The dealer had changed by purge valve and resealed my leaking intake manifold but the problem persists. I'm glad you found your solution which was to change the tune back to stock, but I am on a stock tune, wonder what causes these hesitations?
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C63 AMG
I have this exact same problem as you ezatnova!!! However, my car is currently running the stock tune with K&N intakes and charcoal delete. It's been happening for a few months now, and within these few months I have taken it to the dealer, and the problem is still present. The dealer had changed by purge valve and resealed my leaking intake manifold but the problem persists. I'm glad you found your solution which was to change the tune back to stock, but I am on a stock tune, wonder what causes these hesitations?
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2011 C63 AMG
My car did something similar I think to what you describe after I got my tune a while back. I did a tcu reset took the problem away. Here is the link on the steps, same steps for both pre facelift and facelift.
https://mbworld.org/forums/c63-amg-w...tcu-reset.html
https://mbworld.org/forums/c63-amg-w...tcu-reset.html
Last edited by LAMB09; Nov 17, 2013 at 01:05 AM.
