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Feeling of Stalling / Dying

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Old 12-20-2013, 10:03 AM   #1
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Default Feeling of Stalling / Dying

I have a quick question for all of you guys (and girls?) before I take my car into my clueless dealership.

Recently, when I slow to a stop, or sometimes when I slow way down to take a sharp corner, once my S6 shifts all the way down, it feels like it wants to stall or die but will then jerk "back to life," if you know what I mean. This is not in M or S.

I think the power may even be momentarily shutting off, because I notice when this happens, sometimes my radar detector will shut off and immediately power back on. I just wondered if anyone has had any similar experiences. I'll definitely be taking the car in, but honestly I typically have to tell my dealership about known issues because they are clueless. They are still fighting me on the steering update which I know is out there. Sigh. Thanks in advance.
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Old 12-20-2013, 12:33 PM   #2
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Originally Posted by birdyA6 View Post
I have a quick question for all of you guys (and girls?) before I take my car into my clueless dealership.

Recently, when I slow to a stop, or sometimes when I slow way down to take a sharp corner, once my S6 shifts all the way down, it feels like it wants to stall or die but will then jerk "back to life," if you know what I mean. This is not in M or S.

I think the power may even be momentarily shutting off, because I notice when this happens, sometimes my radar detector will shut off and immediately power back on. I just wondered if anyone has had any similar experiences. I'll definitely be taking the car in, but honestly I typically have to tell my dealership about known issues because they are clueless. They are still fighting me on the steering update which I know is out there. Sigh. Thanks in advance.
Yes! I have this happen a lot. Have never sat down to try and explain it on here, thank you for doing so. I've only had this happen while decelerating into a sharp turn then pressing on the pedal and expecting to accelerate only to have my body lurch forward in anticipation of acceleration that doesn't happen. It's weird and disconcerting, but I cannot reproduce it on command.
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Old 12-20-2013, 01:27 PM   #3
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Originally Posted by S4thrills View Post
Yes! I have this happen a lot. Have never sat down to try and explain it on here, thank you for doing so. I've only had this happen while decelerating into a sharp turn then pressing on the pedal and expecting to accelerate only to have my body lurch forward in anticipation of acceleration that doesn't happen. It's weird and disconcerting, but I cannot reproduce it on command.
That's different than what the OP is explaining. You're experiencing the ESC/ASR activating by cutting power when it senses the car is going to lose traction.
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Old 12-20-2013, 01:46 PM   #4
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That's different than what the OP is explaining. You're experiencing the ESC/ASR activating by cutting power when it senses the car is going to lose traction.
Correct me if mistaken, but when ESC/ASR activates the dummy light comes on (flashes IIRC). Is that accurate? Because in my case, it is not, and I don't believe it's ever happened when I have come anywhere close to losing traction. To me, it feels like power completely cuts out for a second.
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Old 12-20-2013, 01:57 PM   #5
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Originally Posted by birdyA6 View Post
I have a quick question for all of you guys (and girls?) before I take my car into my clueless dealership.

Recently, when I slow to a stop, or sometimes when I slow way down to take a sharp corner, once my S6 shifts all the way down, it feels like it wants to stall or die but will then jerk "back to life," if you know what I mean. This is not in M or S.

I think the power may even be momentarily shutting off, because I notice when this happens, sometimes my radar detector will shut off and immediately power back on. I just wondered if anyone has had any similar experiences. I'll definitely be taking the car in, but honestly I typically have to tell my dealership about known issues because they are clueless. They are still fighting me on the steering update which I know is out there. Sigh. Thanks in advance.
Super weird that your radar detector loses power. Does it happen everytime your car does this?
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Old 12-20-2013, 04:18 PM   #6
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Yes! I have this happen a lot. Have never sat down to try and explain it on here, thank you for doing so. I've only had this happen while decelerating into a sharp turn then pressing on the pedal and expecting to accelerate only to have my body lurch forward in anticipation of acceleration that doesn't happen. It's weird and disconcerting, but I cannot reproduce it on command.
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Old 12-20-2013, 06:09 PM   #7
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That's different than what the OP is explaining. You're experiencing the ESC/ASR activating by cutting power when it senses the car is going to lose traction.
This is the infamous lag that's been discussed here in the past. I don't think it has anything to do with ESC or loss of traction.

Two reasons - 1) Like others have said, power cuts out but then comes on full force after a couple of seconds - enough to snap your head back. If ESC were active, it wouldn't dump all that power on you like that.

2) The lag is essentially non-existent in manual shifting mode.
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Old 12-20-2013, 07:00 PM   #8
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This is the infamous lag that's been discussed here in the past. I don't think it has anything to do with ESC or loss of traction.

Two reasons - 1) Like others have said, power cuts out but then comes on full force after a couple of seconds - enough to snap your head back. If ESC were active, it wouldn't dump all that power on you like that.

2) The lag is essentially non-existent in manual shifting mode.
The ESC system can be programmed to react differently in this instance. Both my B8 A4 and C7 A6 cut power completely only when the car is accelerated excessively into a hard turn, usually from a stop. I wouldn't describe this as "lag" - it's a total power cut out for 2 or 3 seconds and only when the car is pushed almost to the max. This would indicate a relationship to the car reacting to a significant potential loss of traction or control as result of G-force from an extreme angle of departure. Hence, it can only be explained as ESC or ASR related. (FWIW, neither of my cars was/is equipped w/turbos).

I believe what causes this temp loss of power in this instance, is in reaction, to the ESC/ASR registering extreme angle, speed and G-force parameters which would explain why it doesn't completely cut all power in a straight line or gentle curve slippery road traction loss. The aforementioned ESC parameters could also be programmed to be less restrictive in manual shift mode.
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Old 12-21-2013, 12:16 PM   #9
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The ESC system can be programmed to react differently in this instance. Both my B8 A4 and C7 A6 cut power completely only when the car is accelerated excessively into a hard turn, usually from a stop. I wouldn't describe this as "lag" - it's a total power cut out for 2 or 3 seconds and only when the car is pushed almost to the max. This would indicate a relationship to the car reacting to a significant potential loss of traction or control as result of G-force from an extreme angle of departure. Hence, it can only be explained as ESC or ASR related. (FWIW, neither of my cars was/is equipped w/turbos).

I believe what causes this temp loss of power in this instance, is in reaction, to the ESC/ASR registering extreme angle, speed and G-force parameters which would explain why it doesn't completely cut all power in a straight line or gentle curve slippery road traction loss. The aforementioned ESC parameters could also be programmed to be less restrictive in manual shift mode.
In my case, it is when I am slowing into a turn, then press on the accelerator as I start to exit the turn and the car just doesn't react then it kicks back in. I know what you are describing but that isn't the behavior that is causing the response from the car, it's the opposite. This is every day driving when it happens, not spirited driving in any way.

Perhaps it is the programmed response, but the parameters are off in some way.
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Old 12-21-2013, 04:56 PM   #10
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In my case, it is when I am slowing into a turn, then press on the accelerator as I start to exit the turn and the car just doesn't react then it kicks back in. I know what you are describing but that isn't the behavior that is causing the response from the car, it's the opposite. This is every day driving when it happens, not spirited driving in any way.

Perhaps it is the programmed response, but the parameters are off in some way.
This was my experience also. And when my car's power came back on, it just came back on...not with a surge or any significant force. And I would say that a 2 second engine shutdown was about right. Very disconcerting. Could have been very problematic if I needed the power at that instant to avoid another vehicle.
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Old 12-21-2013, 05:38 PM   #11
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I was playing around at traffic lights tonight with different accelerator input using all transmission modes. This hesitation occurs in all modes-D,S,and M. It occurs from idle around 600 rpm until about 1400 rpm and I suspect it is basically the result of the relatively low torque that the motor produces below 1400 rpm that rapidly increases above that point as the turbos spool up (i.e. the dreaded turbo lag). Not sure how an aftermarket tune can dramatically improve this.
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Old 12-21-2013, 07:53 PM   #12
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I believe the delay is programmed in as a safety feature. I suspect anytime the wheel is turned from center, going from closed throttle to open will cause the delay. I think it's there to avoid lawsuits and accidents. You know, mom borrows S6 and hits the gas instead of the brake, or applies too much throttle in a turn...

It would also seem that the APR tune totally eliminates this delay based on other threads...
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Old 12-25-2013, 05:05 AM   #13
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Originally Posted by birdyA6 View Post
I have a quick question for all of you guys (and girls?) before I take my car into my clueless dealership.

Recently, when I slow to a stop, or sometimes when I slow way down to take a sharp corner, once my S6 shifts all the way down, it feels like it wants to stall or die but will then jerk "back to life," if you know what I mean. This is not in M or S.

I think the power may even be momentarily shutting off, because I notice when this happens, sometimes my radar detector will shut off and immediately power back on. I just wondered if anyone has had any similar experiences. I'll definitely be taking the car in, but honestly I typically have to tell my dealership about known issues because they are clueless. They are still fighting me on the steering update which I know is out there. Sigh. Thanks in advance.
I have the same. Not only when turning, but also when I release the brake pedal and try to roll without pushing gas pedal.
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Old 12-25-2013, 06:04 AM   #14
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I have the lag as well which feels like a dead spot. It almost caused me to clip a car while trying to pull out of a lane and pass another car I traffic. Now I know to expect the delay but I really wish it could be turned off without getting the APR tune.
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Old 12-25-2013, 06:26 AM   #15
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Another observation is that the tranny is resistant to downshifting to 1st gear if the car is in motion even the slightest bit. If you don't come to a complete stop for at least half a second, it stays in 2nd gear. When you restart in 2nd, the rpms and torque are too low and you hesitate. If you don't slow to under around 5 mph when turning, you usually stay in 3rd gear and same problem exists when trying to accelerate out of the turn. RPM's are too low for the torque required.

A simple fix for this problem may be a tranny remap to get it to kick down to a lower gear more readily. Driving in manual mode and dropping to a lower gear than D/S usually does seems to alleviate the lag.
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Old 12-25-2013, 10:01 AM   #16
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I believe this is due to the DCT in the S6/S7. C&D noticed it as well and said it sometimes felt like the clutch was slipping. I'm reading enough on this issue here that it concerns me as a possible future buyer.
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Old 12-26-2013, 12:30 PM   #17
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Just wanted to add myself to the list of people who have experienced what this thread is talking about. I have a 2014 S6... have all the updates applied. I drive mostly in D mode (ADS set to Auto for engine/throttle and suspension, Dynamic for everything else). The feeling of death/stalling is annoying... I've had a few instances when I wasn't expecting it and got shoved forward in my seat. My car doesn't completely die or lose radio/electronics. I agree with others seems to be a torque/transmission gear shifting problem. Maybe they can address this with a software update if more of us complain about it and point the engineers to this forum
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Old 12-26-2013, 03:26 PM   #18
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I've had a few instances when I wasn't expecting it and got shoved forward in my seat.
That is the feeling that I hate. Almost smashing into the steering wheel. Happened again to me today, but then I tried to drive around for 20 minutes and reproduce it but haven't been able to yet.
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Old 12-26-2013, 03:31 PM   #19
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I was playing around at traffic lights tonight with different accelerator input using all transmission modes. This hesitation occurs in all modes-D,S,and M. It occurs from idle around 600 rpm until about 1400 rpm and I suspect it is basically the result of the relatively low torque that the motor produces below 1400 rpm that rapidly increases above that point as the turbos spool up (i.e. the dreaded turbo lag). Not sure how an aftermarket tune can dramatically improve this.
I think this is the very thing a tune helps. Everyone who has a tune has reported either dramatic improvement in the lag or it disappearing probably due to the increase in torque.
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Old 12-27-2013, 12:14 AM   #20
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I also have the same issue.
In my experience it's a sort of a timing or gas valve problem that doesn't react the way it should.
The delay is maximum 2 seconds and is scarry at some moments.
in my opinion the car thinks it's going to stop and puts "something" in a sleep mode.
In fact you don't stop,but the car is still rolling, then if you have to drive away the car has the delay.
It could be a interaction with speed sensors from wheels/gearbox sensor etc.. Programmed wrongly.

My car is from 10-10-11 and have all the tsb's done but still the same problem.

Last edited by arjanh; 12-27-2013 at 12:29 AM.
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Old 12-27-2013, 12:14 AM
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