Is it true we can disable cylinder deactivation mode?

[madyspop]

If so is this something done through the MMI or Vag-Com?

[DGVR6]

In short no.


But on the bright side.. on my vcds drop down for engine/adaptions I found cylinder deactivation auto/8/4.
Looks like it's a diagnostic step for Audi techs or something.

Only way to get to it is if you have your PIN/SKC or security access code. Not sure if it'll accept coding even with access though.

Still a chance

[schrajw]

In short no.


But on the bright side.. on my vcds drop down for engine/adaptions I found cylinder deactivation auto/8/4.
Looks like it's a diagnostic step for Audi techs or something.

Only way to get to it is if you have your PIN/SKC or security access code. Not sure if it'll accept coding even with access though.

Still a chance

Highly interested in deactivating, mind sharing how you got there in VCDS?

[SilveR316]

Highly interested in deactivating, mind sharing how you got there in VCDS?

Same. I'd love to be able to do it through VCDS, but getting a tuner to deactivate it in S and M modes would be good too.

[schrajw]

Same. I'd love to be able to do it through VCDS, but getting a tuner to deactivate it in S and M modes would be good too.

Wasn't aware any tuner has provided the ability to deactivate yet... know it's been talked about but is there actually anyone programming this out currently?

[SilveR316]

Wasn't aware any tuner has provided the ability to deactivate yet... know it's been talked about but is there actually anyone programming this out currently?

Maybe EPL?

I've only mentioned it in their tune thread. They said their tune does not currently do this and no one has asked them about it. Someone else said it was possible for a tuner to fix this, so I guess it's just a matter of letting tuners know that we want this. In M mode around 3k rpm... its really freaking annoying. I have no idea how Audi didn't do this from factory. It's not noticeable in D more. The last thing I care about when I'm messing around in M mode is fuel economy.

That said... whichever tuner is first to disabled cylinder deactivation in S and M (or at at the very least M) will earn my money...

[schrajw]

Agreed!

[SilveR316]

Agreed!

Let them know that you want it.

http://www.audizine.com/forum/showth...-flash-at-home

[DGVR6]

Highly interested in deactivating, mind sharing how you got there in VCDS?

Once I grab the laptop tomorrow I'll post some shots

[DGVR6]

Select module
01-Engine ---> Adaptation - 10 ---> IDE07216 Deactivate partial motor operation

[schrajw]

Do recall seeing that, but couldn't get past security. Anyone have the security access key for a MY17?

[schrajw]

Select module
01-Engine ---> Adaptation - 10 ---> IDE07216 Deactivate partial motor operation

Ok, so have some results to report back with. Did the above adaptation using security code 20103 (not sure why that key didn't work prior, maybe the engine ECM was in temporary protection mode or something). Selected to run the engine in all cylinder operation full time from the drop down menu. The controller accepted the new value, but I immediately got an engine MIL with a DTC stating cyl deactivation was inactive (intermittent). The engine and EPC lights stayed on the dash the entire time driving but... no more cylinder deactivation! Drove in every mode and combination of settings possible, and it never dropped out of 8 cyl mode.

However... I then cycled the ignition off and restarted the car... the engine controller apparently resets the adaptation value each time you stop/start the vehicle. So, we're on the right track, just need to figure out how to make it stick through power cycling the ignition. Any ideas?

[DGVR6]

My guess is that there might be something else we have to code, probably in long coding there should be a bit or 2 that needs to be either checked or uncheck.

I'll have to play around with it.

Btw, before you start playing around with long coding as nothing is labeled yet, make sure you save your original coding

[schrajw]

My guess is that there might be something else we have to code, probably in long coding there should be a bit or 2 that needs to be either checked or uncheck.

I'll have to play around with it.

Btw, before you start playing around with long coding as nothing is labeled yet, make sure you save your original coding

Definitely, learned that lesson yrs ago... appreciate the reminder though. Sure would be nice to have label files for MY17, hint hint hint... I'll stay in touch if I have any luck.

[scott99c2]

What do you guys hope to get out of the cylinder deactivation? I'm just wondering what behaviors would be eliminated?

[schrajw]

Valid question...

1. Although the deactivation system is almost undetectable, the slight shudder and associated hesitation is annoying especially when you're running a tuned ECM. More noticeable than stock imo.

2. The resultant exhaust note while in 4 cyl mode is quite a bit more pronounced with a performance exhaust system. While the stock exhaust handled it well, most of us running aftermarket exhausts simple hate the sound and induced vibration through the chassis. I'm personally running a Milltek Valvesonic Non-Res system, and it's constantly closing the valved bypass muffler ports off due to deactivation programming.

3. It's a high output v8 engine, and I'd like control of all 8 cylinders at all times. It's just the way I prefer my engines.

[Dasquade]

Valid question...

1. Although the deactivation system is almost undetectable, the slight shudder and associated hesitation is annoying especially when you're running a tuned ECM. More noticeable than stock imo.

2. The resultant exhaust note while in 4 cyl mode is quite a bit more pronounced with a performance exhaust system. While the stock exhaust handled it well, most of us running aftermarket exhausts simple hate the sound and induced vibration through the chassis. I'm personally running a Milltek Valvesonic Non-Res system, and it's constantly closing the valved bypass muffler ports off due to deactivation programming.

3. It's a high output v8 engine, and I'd like control of all 8 cylinders at all times. It's just the way I prefer my engines.

Regarding nr. 2, running milltek valved non-res too....but i deactivated the flaps (well apperently somebody had already done it before me on the stock sports exhaust).
This apperently keeps the stock valves module 'open':
1). Engine module
Byte 9
Bit 2 - exhaust flaps installed (uncheck that)
Should be able to keep the flaps open permanently thrue VCDS.
But i'm looking for an alternative in the (near) future (R8 GT steeringwheel with working exhaust flaps button).
Hopefully we found out more in the future about the coding of the cilinder de/activation and maybe (wild dream) it could be progammed on the fly and mapped to dedicated button (performance button on R8 GT wheel).

[schrajw]

Have you considered using AWE's remote setup?

http://www.awe-tuning.com/switchpath-exhaust-remote

It's easy to install and works well. Was considering that, or waiting for Milltek's new Valvesonic Plus controller which is totally customizable. Either one will allow manual override of exhaust valve actuators.

[Dasquade]

Have you considered using AWE's remote setup?

http://www.awe-tuning.com/switchpath-exhaust-remote

It's easy to install and works well. Was considering that, or waiting for Milltek's new Valvesonic Plus controller which is totally customizable. Either one will allow manual override of exhaust valve actuators.

If that was meant for me.....i have considered waiting for the milltek controller but it is still in development. That combined with hopefully functional R8 GT steeringwheel (collecting dust here) that would be golden :). Time will tell, for the moment valves are open and unchecked with Vagcom.

[scott99c2]

Valid question...

1. Although the deactivation system is almost undetectable, the slight shudder and associated hesitation is annoying especially when you're running a tuned ECM. More noticeable than stock imo.

2. The resultant exhaust note while in 4 cyl mode is quite a bit more pronounced with a performance exhaust system. While the stock exhaust handled it well, most of us running aftermarket exhausts simple hate the sound and induced vibration through the chassis. I'm personally running a Milltek Valvesonic Non-Res system, and it's constantly closing the valved bypass muffler ports off due to deactivation programming.

3. It's a high output v8 engine, and I'd like control of all 8 cylinders at all times. It's just the way I prefer my engines.

Thanks, I've noticed item 1 and would like item 3, but I would also like to put it back on road trips so that I can get the fuel mileage that goes with it. I still need to use it as long trip transport too.

[madyspop]

Thanks, I've noticed item 1 and would like item 3, but I would also like to put it back on road trips so that I can get the fuel mileage that goes with it. I still need to use it as long trip transport too.

That's where I'm having my biggest issue is on road trips when it's constantly changing he tine of my exhaust. The slightest decrease in throttle will lower the tone of my system to an annoying sound in the cabin only to be relieved by throttling up again. It happens right in the sweet spot of where I'd like to be cruising at and it's driving me crazy. I'm also on the Milltek turbo back test pipes with high flow cats, center resonator and resonated rear section.

[schrajw]

Thanks, I've noticed item 1 and would like item 3, but I would also like to put it back on road trips so that I can get the fuel mileage that goes with it. I still need to use it as long trip transport too.

I'm right there with you guys on the ability to re-enable cyl deactivation for longer commutes/trips to increase MPG. Hopeful we'll get this sorted and figure out how to make that possible.

Go figure the stock exhaust system did a great job of muffling the switch over tone... too bad it was too quiet for my taste else I'd have kept it. First world issues...

[richib86]

Having COD on in D but off in S and M would be the ideal setup

[SilveR316]

Having COD on in D but off in S and M would be the ideal setup

I'm really hoping a tuner comes along and does it. That would be enough to push me to get a tune.

[schrajw]

Having COD on in D but off in S and M would be the ideal setup

Agree

[Dasquade]

I'm really hoping a tuner comes along and does it. That would be enough to push me to get a tune.

Mailed my tuner....never know....

[Dasquade]

News from my tuner:
COD sadely doesn't work on D/S/M but works on all modes.
The system (COD) can be selectively turned off through the engine software, for example COD only in gear 6 and 7, but no COD in the lower gears.
But the system (COD) can also be permantly disabled.

No info or codes were given (didn't asked atm). I might ask if they can share them...

[SilveR316]

News from my tuner:
COD sadely doesn't work on D/S/M but works on all modes.
The system (COD) can be selectively turned off through the engine software, for example COD only in gear 6 and 7, but no COD in the lower gears.
But the system (COD) can also be permantly disabled.

No info or codes were given (didn't asked atm). I might ask if they can share them...

I would take COD only in 6 and 7 (or even just 7). Obviously not ideal like COD only in D, but its better than what we have now.

[schrajw]

News from my tuner:
COD sadely doesn't work on D/S/M but works on all modes.
The system (COD) can be selectively turned off through the engine software, for example COD only in gear 6 and 7, but no COD in the lower gears.
But the system (COD) can also be permantly disabled.

No info or codes were given (didn't asked atm). I might ask if they can share them...

That's good news at least. If it can be done via VCDS, I'd pay them for the coding procedure if that helps.

[Dasquade]

I'll keep you updated if they reply ;).

[Dasquade]

Bad news....according to my tuner it isn't possible as tuner to modify it as the adjustments need to be made inside the engine software itself (instead of inside the 'linked' folders where normaly tunes are read from....or so i understand).
The adjustments above might be a start, but looks it might indeed only be a temp. overwrite untill you restart/reboot the system :s and it indeed need hardcore coding (at dealer/developers level?).
Simular answer when i asked if the COD couldn't be adjusted like with an 'apr switch' but like above, the COD software is read on a deeper level and won't work from inside the 'linked' folders they use in the switch.

Different platform, different car....but i always wondered what is altered in the 2016 R8 over the 'GT' performence button/dial? I kinda assume it read different ECU programs? Not the same as drive select parameters (not sure if the R8 also has COD, but it mainly switches off ESP etc...). Anyway.....

[schrajw]

Bad news....according to my tuner it isn't possible as tuner to modify it as the adjustments need to be made inside the engine software itself (instead of inside the 'linked' folders where normaly tunes are read from....or so i understand).
The adjustments above might be a start, but looks it might indeed only be a temp. overwrite untill you restart/reboot the system :s and it indeed need hardcore coding (at dealer/developers level?).
Simular answer when i asked if the COD couldn't be adjusted like with an 'apr switch' but like above, the COD software is read on a deeper level and won't work from inside the 'linked' folders they use in the switch.

Different platform, different car....but i always wondered what is altered in the 2016 R8 over the 'GT' performence button/dial? I kinda assume it read different ECU programs? Not the same as drive select parameters (not sure if the R8 also has COD, but it mainly switches off ESP etc...). Anyway.....

Appreciate your time on this. Kinda figured that might be the case, although I'd like to understand the limitations better in order to rule it out entirely. You bring up another idea though... have we verified whether or not COD is off when ESP is off? Just an idea... will verify on ride home tonight after work. If it does shut it off, might offer up a new programming attack angle.

[scott99c2]

I heard from my tuner today as well, they are working on a solution.

[Dasquade]

Saw this on fb of a 'local' tuner today...sended them an email, will see what they say :)


Also drove around with the COD screen on in S-mode today, granted i didn't drove super slow but didn't saw the 4 cilinder mode turn on, while in D it did.
Guess in S the rpm's don't drop too low?

[schrajw]

Saw this on fb of a 'local' tuner today...sended them an email, will see what they say :)


Also drove around with the COD screen on in S-mode today, granted i didn't drove super slow but didn't saw the 4 cilinder mode turn on, while in D it did.
Guess in S the rpm's don't drop too low?

Noticed that as well, now that I'm racking up some miles on the car. I share a theory with a few folks who have mentioned it before... the engine ECM "learns" how you drive in S mode and therefore some of us experience COD and others do not??

[schrajw]

Also been noticing COD is definitely tied to traction control and, of course, cruise control programming as well. Have definitely noticed a massive reduction of COD events when in S mode (incl S/M) on the DSG tranny, with traction control in sport mode and not using cruise control. In fact, now that I've got some miles on the rig without having to reset fault codes in the engine module (which resets readiness data and appears to cause the ECM to "relearn" your driving style -- theory), I haven't dropped in 4 cyl mode in days. Hmmm... makes you wonder what's going on behind the scenes.

[Dasquade]

Also been noticing COD is definitely tied to traction control and, of course, cruise control programming as well. Have definitely noticed a massive reduction of COD events when in S mode (incl S/M) on the DSG tranny, with traction control in sport mode and not using cruise control. In fact, now that I've got some miles on the rig without having to reset fault codes in the engine module (which resets readiness data and appears to cause the ECM to "relearn" your driving style -- theory), I haven't dropped in 4 cyl mode in days. Hmmm... makes you wonder what's going on behind the scenes.

Could be true COD only gets triggered when several varibles match. Kinda hated my B8 had the 'learning module' (throttle response/input).
Today i tried to trigger COD again in S mode, but it didn't came on....when i tought it would (slow driving on constant speed in high gear.....maybe it wanted a longer constant driving time?).
Personally no issues with its current behavior (still works in D).
No reply of the tuner yet, i'll post if i get an answer (but dought they will go into details or even that far as sharing codes). Never know :).

[Dasquade]

Update from BR performance regarding the COD and flaps:
In short you can't code any of both with vcds, but it needs to happen within the engine management (this is regulated by 'reconnaise-fields, i suspect varibles).
They say it is pretty easy to do, but need to have the right tolls (software and knowhow).
Personally no need for it, beside maybe the flaps but going to handle that in the future i hope.
I suppose most tuners or dealers that are modfriendly do have the needed tool to adjust the COD/flaps if wanted....

[SilveR316]

Some more info.

I reset fault codes on the engine module Saturday morning. According to the above post this should reset readiness data and cause the ECM to relearn my driving style.

It definitely seemed to behave a bit differently, and I spent the rest of the day driving somewhat erratically and throwing it out of 4-cyl mode by monitoring the fuel consumption bar when it changed from grey to green. Overall, this seems to have done nothing in the end. My car goes in to 4-cyl mode in D/S/M modes within 2-3 seconds of regular cruising. Maybe it needs a longer period to relearn? Not sure...

I also tried driving with ESP in sport mode. This seems to work well at lower speeds and my car did not enter 4-cyl mode when driving around at less than highway speeds. However, as soon as I hit the highway and was cruising along at 70-80 mph, it had no effect on cylinder deactivation.

So... all in all... kind of a wash. I really wish a tuner would come out with a tune that just disabled 4-cyl mode in S and M (or at the very least M). It's starting to be super annoying to hear the 4 to 8 cylinder switch over whenever I touch the gas.

[SubaruSTI8]

Might be a stupid question, but I cant get the fuel consumption bar to show. How do i get it to show up?