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Throttle delay...lag...whatever, is driving me nuts.

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Old 08-29-2013, 04:34 PM   #1
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Default Throttle delay...lag...whatever, is driving me nuts.

I don't know if this will help, but if you have an issue with the throttle delay or lag or whatever you want to call it, could you post here in this thread?

In my case, when I come to a stop, it can take two seconds or more before the car will start to accelerate when I press on the throttle. Turning left or right onto a busy road after coming to a stop is scary and dangerous. When I corner, the car bogs down and refuses to accelerate for about a second. When driving around in 'D' in sixth or seventh gear, I can operate the throttle like it's a pogo stick and the car won't even register any of the presses if they are relatively quick.

Having such poor response time takes all the fun out of driving the car in a spirited manner.

The car is great on the highway and for getting from point A to point B quickly and comfortably. But, the car is not a lot of fun, and I'm wondering if it's even a bit dangerous.

I hate to be negative, but if enough people have the same problem, perhaps Audi will make some adjustment to how the throttle works?

Is it true that the delay is gone for those who have the APR/Unitronic tune?
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Old 08-29-2013, 05:43 PM   #2
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I don't know if this will help, but if you have an issue with the throttle delay or lag or whatever you want to call it, could you post here in this thread?

In my case, when I come to a stop, it can take two seconds or more before the car will start to accelerate when I press on the throttle. Turning left or right onto a busy road after coming to a stop is scary and dangerous. When I corner, the car bogs down and refuses to accelerate for about a second. When driving around in 'D' in sixth or seventh gear, I can operate the throttle like it's a pogo stick and the car won't even register any of the presses if they are relatively quick.

Having such poor response time takes all the fun out of driving the car in a spirited manner.

The car is great on the highway and for getting from point A to point B quickly and comfortably. But, the car is not a lot of fun, and I'm wondering if it's even a bit dangerous.

I hate to be negative, but if enough people have the same problem, perhaps Audi will make some adjustment to how the throttle works?

Is it true that the delay is gone for those who have the APR/Unitronic tune?
Did you get the TSB's installed?
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Old 08-29-2013, 06:35 PM   #3
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TSB made only marginal difference in my case. The S-mode shifts became even worse also.
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Old 08-29-2013, 06:44 PM   #4
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TSB made only marginal difference in my case. The S-mode shifts became even worse also.
Similar experience here. D mode became smoother. S-mode became MUCH worse...

Is there anything else we can do?
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Old 08-29-2013, 07:12 PM   #5
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Did you get the TSB's installed?
Yes, my car was in for the TSB last week.

I have noticed some improvements while accelerating. The car seems to shift better going up the gears - perhaps the shift points were tweaked. It honestly feels faster. The car is a rocket.

Coming to a stop in 'S' mode is just as jerky as before.

I was hoping for a change in the throttle delay but it seems the same as before the TSB.
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Old 08-29-2013, 07:17 PM   #6
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That was one of the biggest improvements that I have seen if the 2 weeks since getting my car tuned. The throttle response was awful from the factory for the reasons mentioned, and the jerky whiplash downshifts when in dynamic sport mode was ridiculous and unacceptable.

Those are the 2 major areas that have been corrected with my tune. Have been tuning my cars for over 20 years, and my reason for tuning above having more power and torque is having the car be more engaging and removing what I call the slop from the factory OEM calibrations.
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Old 08-29-2013, 07:30 PM   #7
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Default Turbo lag

Having owned turbo cars before, I recognize the turbo lag. The degree to which I see it depends on just how low the revs are when I step down and seems worse when I fully mash the gas from a stop. That's probably why they included a programmed launch control from high rpm, but its of little use in everyday driving. I suspect that the idle rpm is set low to save gas and that this makes the problem worse.

Regarding the downshifts, mine also occur in Auto, but maybe the computer has "learned" that I have a heavy foot. I go in in a couple of weeks for the various TSBs and we'll see.
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Old 08-29-2013, 07:39 PM   #8
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Having owned turbo cars before, I recognize the turbo lag. The degree to which I see it depends on just how low the revs are when I step down and seems worse when I fully mash the gas from a stop.
Just to be clear, I'm not referring to turbo lag. When I press on the gas nothing happens 'at all' until the car decides that I must actually be serious and my foot didn't 'slip' onto the gas pedal by mistake. I could probably live with a half-second delay but not two seconds sometimes when turning onto a busy road with cars coming at me.
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Old 08-29-2013, 08:32 PM   #9
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Coming to a stop in 'S' mode is just as jerky as before.
I can confirm this and I noticed it immediately on the drive home from the service department. Is there any use in going back and telling them the problem is not fixed?
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Old 08-29-2013, 10:17 PM   #10
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My car was in for a service before this TSB was available. I complained again about the jerky downshifts in 'S' mode and their solution was a Transmission Adaptation. I would say that it's about 80% better than it was (still the occasional clunker going into 2nd, but much improved). Maybe the answer, for those getting the TSB, is to request a Tranny Adaptation be performed right after the update.
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Old 08-30-2013, 02:47 AM   #11
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My car has the jerky downshifts when in S Mode, and it does take a moment for the power to kick in when I try to speed away from a stop.

I only have 400 miles on the car (2013 model), so I doubt that I have the TSB. Will inquire about that at the first service.
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Old 08-30-2013, 04:50 AM   #12
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My car was in for a service before this TSB was available. I complained again about the jerky downshifts in 'S' mode and their solution was a Transmission Adaptation. I would say that it's about 80% better than it was (still the occasional clunker going into 2nd, but much improved). Maybe the answer, for those getting the TSB, is to request a Tranny Adaptation be performed right after the update.
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Old 08-30-2013, 11:09 AM   #13
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This has been discussed at length previously and yes I (and most others) experience it too. An aftermarket tune supposedly addresses this. I haven't had any TSBs done to confirm whether Audi changed anything.

It seems to happen when you get on the gas right after braking. You basically learn to anticipate it and I've adjusted by either expecting it by not getting into a situation where I need the power, or try to brake early enough that by the time I'm ready to get back on the gas the required couple of seconds have passed. This certainly is not ideal, but is better than finding out while you're trying to scoot into or across traffic.
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Old 08-30-2013, 11:39 AM   #14
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Is your two second lag when you are in Sport mode? There is some lag for me but nothing close to 2 seconds. Maybe it is that bad in comfort mode but since I hardly drive in that, and don't stomp on the gas in that mode it would be a lot less noticeable.
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Old 08-30-2013, 05:03 PM   #15
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Is your two second lag when you are in Sport mode? There is some lag for me but nothing close to 2 seconds. Maybe it is that bad in comfort mode but since I hardly drive in that, and don't stomp on the gas in that mode it would be a lot less noticeable.
I have everything set to Dynamic, and have gotten in the habit of consistently shifting into Sport when I am at a stop sign/light. I still have a pronounced delay even when applying "aggressive" amounts of throttle. Late '13 build, 5k service is Tuesday, I'll see what TSBs may apply.
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Old 08-30-2013, 05:05 PM   #16
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Is your two second lag when you are in Sport mode? There is some lag for me but nothing close to 2 seconds. Maybe it is that bad in comfort mode but since I hardly drive in that, and don't stomp on the gas in that mode it would be a lot less noticeable.
I timed my lag today -- it is about 3/4 of a second when you punch on the gas from a stop, and 1/2 a second when accelerating when driving. All of this is when the transmission is in Comfort mode (not S mode.)

When in S mode, the lag is almost eliminated.

I learned that throttle lag is a major issue with BMW M5s as well -- it is all over the BMW forums. Must be some gas-saving thing.

I talked to the Audi service writer, he had not had anyone complain about it yet.
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Old 08-30-2013, 06:18 PM   #17
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I timed my lag today -- it is about 3/4 of a second when you punch on the gas from a stop, and 1/2 a second when accelerating when driving. All of this is when the transmission is in Comfort mode (not S mode.)

When in S mode, the lag is almost eliminated.

I learned that throttle lag is a major issue with BMW M5s as well -- it is all over the BMW forums. Must be some gas-saving thing.

I talked to the Audi service writer, he had not had anyone complain about it yet.
Definitely agree. My wife's 2010 M5 has lag as well. No turbos on that engine to spool up or cause 'turbo lag'. I concur that it is some kind of programming from the factory which is evidenced by it completely disappearing with a tune.
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Old 08-30-2013, 07:13 PM   #18
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My car was in for a service before this TSB was available. I complained again about the jerky downshifts in 'S' mode and their solution was a Transmission Adaptation. I would say that it's about 80% better than it was (still the occasional clunker going into 2nd, but much improved). Maybe the answer, for those getting the TSB, is to request a Tranny Adaptation be performed right after the update.
Can u perform tranny adaptation using Vag tool instead of scheduling visit to a dealer?
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Old 08-30-2013, 07:28 PM   #19
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I timed my lag today -- it is about 3/4 of a second when you punch on the gas from a stop, and 1/2 a second when accelerating when driving. All of this is when the transmission is in Comfort mode (not S mode.)
I find the lag is much longer after I just come to a stop and immediately attempt to accelerate. It happens every day I drive to the top of my street, stop to look both ways and then turn left. Two seconds would be on the conservative side; it's probably closer to three seconds.

With longer stops the lag seems diminished, probably around the 1/2 to 3/4 second second as GermanGarage experiences.
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Old 08-30-2013, 08:20 PM   #20
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Can u perform tranny adaptation using Vag tool instead of scheduling visit to a dealer?
No idea, I'm afraid. It's certainly possible, but so far undocumented.
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