DSG Fart Totally Gone. What Could Have Happened?

[codegenesis]

Hi guys,

I recently went for a Stage 1 ECU and TCU tune. The car was more responsive and alive but it bogs down on every gear change on WOT.

So I told the tuner to detune my TCU back to stock and the problem was still there. Then I told them to revert my ECU to stock too and the problem went away. Which concludes there is something wrong with the ECU tune.

After detuning both my ECU and TCU to stock, the dsg fart has dissappeared totally on both D and S mode. The fart was there before on stock and when running on Stage 1 tune.

What could have been the problem? Any ideas?

Thanks

[blackfunk]

I usually only get the DSG fart between 4k-5k. Try to see if you're able to get it then. Of note I believe that most tuners usually give you a generic box tune when reverting you back to stock and not you original ecu tune.

[doughboy17]

I am unsure which tuner you went with but my TCU tune was bogging before using the tuner's adaptation procedure when flashing to the Stage 1 ECU tune and TCU tune. Adaptation may have helped your original issue. Just a thought.

FYI, I still have my DSG fart when I flash back to stock.

[hmc2261]

When did you take the tunes off? I have heard that just because the tune is gone, it can take a little bit of time to readjust everything by itself, dont know for a fact if thats true or not, but my tuner has told me to give it 24 hrs and things will usually work themselves out.

I would expect a decrease in said Fart with the TCS tune since the shift timing was decreased, I have noticed less of a fart myself with the tcu tune, kinda makes me sad a little bit.

[Tree.Audi]

My DSG fart disappeared after I went 034 Stage 2 (just ECU tune, not TCU tune). Contacted the guys over at 034 about it. They said they purposefully remove the farts for faster shifting.

Edit: after re-reading your original post, I see you removed the tunes. I’m wondering if a DSG adaptation with vagcom might bring the fart back?


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[Solarsuplex]

Did the tuner reflash your car with what they had captured before you did the stage 1 tune or did they just put a base map back on?

[Morritse]

Was it an "apr stock tune" or an actual stock tune. Lol

[street2gen]

But my doctor has told me to give it 24 hrs and things will usually work themselves out.

I would expect a decrease in said Fart with the timing decreased, I have noticed less of a fart myself, kinda makes me sad a little bit.

im sorry.... what...... lol JK

[4DOORFUN]

I'd be more concerned with the bogging on every gear change. I don't see why an ECU tune would make it shift any differently than stock unless the DSG can't handle the added the power. You are not the first person to report this after receiving a power bump.

[hmc2261]

im sorry.... what...... lol JK

Idk whys is saying something completely different that what i wrote, i didnt edit the comment or anything

weird

[codegenesis]

I usually only get the DSG fart between 4k-5k. Try to see if you're able to get it then. Of note I believe that most tuners usually give you a generic box tune when reverting you back to stock and not you original ecu tune.

Nope, cant get it. Previously it would fart on all rpm range. Now its totally gone.

I am unsure whether it was my previous stock tune or it was a generic one. They did read out the stock file before flashing the Stage 1. So I presume, they flashed back the stock file from my car.

[codegenesis]

I am unsure which tuner you went with but my TCU tune was bogging before using the tuner's adaptation procedure when flashing to the Stage 1 ECU tune and TCU tune. Adaptation may have helped your original issue. Just a thought.

FYI, I still have my DSG fart when I flash back to stock.

The tuner did go through the DSG Adaptation after having the bogging down issue. However, that still does not solve the issue.

Do I have to go through the DSG Adaptation process again after returning to stock? Because they didnt performed it after reverting it to stock.

[codegenesis]

When did you take the tunes off? I have heard that just because the tune is gone, it can take a little bit of time to readjust everything by itself, dont know for a fact if thats true or not, but my tuner has told me to give it 24 hrs and things will usually work themselves out.

I would expect a decrease in said Fart with the TCS tune since the shift timing was decreased, I have noticed less of a fart myself with the tcu tune, kinda makes me sad a little bit.

When the bogging issue was there, the tuner told me to give the car few days to readapt to the new tune. But it still did not work out.

And now, after going to stock the DSG fart is gone. Been driving the car for few days now and its still the same.

[codegenesis]

My DSG fart disappeared after I went 034 Stage 2 (just ECU tune, not TCU tune). Contacted the guys over at 034 about it. They said they purposefully remove the farts for faster shifting.

Edit: after re-reading your original post, I see you removed the tunes. I’m wondering if a DSG adaptation with vagcom might bring the fart back?


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The "DSG adaptation with vagcom" is the only thing that I have not tried after going back to stock. Any guide on how to perform the following correctly?

As I mentioned in my previous reply, the DSG adaptation was performed by the tuner when the bogging issue was present. And once back to stock, nothing was done.

[codegenesis]

Did the tuner reflash your car with what they had captured before you did the stage 1 tune or did they just put a base map back on?

I asked them previously and they mentioned they flashed the stock file that was captured from the car previously. I have no idea how to confirm this.

[codegenesis]

I'd be more concerned with the bogging on every gear change. I don't see why an ECU tune would make it shift any differently than stock unless the DSG can't handle the added the power. You are not the first person to report this after receiving a power bump.

Yep, I have been searching through the forum before posting this. And I can see that I am not the only one that is facing the bogging down issue.

[chilort]

Clogged cats?

[Tree.Audi]

The "DSG adaptation with vagcom" is the only thing that I have not tried after going back to stock. Any guide on how to perform the following correctly?

I believe this is the guide I followed: https://youtu.be/bSdPcbsL5w8





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[street2gen]

Clogged cats?

Theres a lot of other things that would accompany clogged cats.

[codegenesis]

Just an update. My DSG fart is still not back regardless of what I do except for one thing :

The only way to get a DSG fart on my car is by changing to M1 and slowly (10% throttle) drive it to 4k rpm and shift to 2nd gear manually, and I'll hear the fart.

In the normal D or S mode regardless of what u do, the fart will never appear.

I don't know what's the issue, definitely not a clogged cats because I'm able to get the fart on Manual 1st to 2nd gear. Anyone have idea or recommendations on what to check or perform?

Thanks

[Midnight_Rider]

It's the tune. Your spark is on when DSG changes gear, which might not be causing the timing retardation during DSG shift which would cause bogging of the engine, not the transmission when shifting. https://www.youtube.com/watch?v=CuoB365XXjg

This is just my speculation. it might be that your engine tune and the DSG tune isn't in sync.

[codegenesis]

It's the tune. Your spark is on when DSG changes gear, which might not be causing the timing retardation during DSG shift which would cause bogging of the engine, not the transmission when shifting. https://www.youtube.com/watch?v=CuoB365XXjg

This is just my speculation. it might be that your engine tune and the DSG tune isn't in sync.

Thanks for your input. I am currently running on stock file for both ECU and TCU and the DSG fart is gone.

I went with tunes from different companies and all had the bogging down issue on each gear change. However, on stock it runs fine without bogging down.

I just gave up on the tunes and now looking solution to get the DSG fart back :(

[Waffles_s4]

All this for a fart. My car can provide some farts...

[codegenesis]

All this for a fart. My car can provide some farts...

Please do channel some to my car. Lol

It's user preference I guess. I love the DSG fart.

[Waffles_s4]

Please do channel some to my car. Lol

It's user preference I guess. I love the DSG fart.

Same, I do like it, i was trying to be funny.

I also hope it's not gone when I tune the ecu/tcu.

[Midnight_Rider]

DSG fart is there for a reason. It helps you shift without lifting your feet up from accelerator. So if that's gone, what does that mean?

[Waffles_s4]

DSG fart is there for a reason. It helps you shift without lifting your feet up from accelerator. So if that's gone, what does that mean?

You tell us, did u notice more RPM when u shift hard in the upper limits?

[Midnight_Rider]

You tell us, did u notice more RPM when u shift hard in the upper limits?

If you're asking me if my RPM goes up after shifting on Stage 2 tune, yes, because I know my tune is not that great.

[schelle_pelle]

Same, same but different here… Did a TCU and ECU Tune by a local tuner and the DSG-Fart is gone… It is quite sad, as I liked the sound. As already stated I can only get it to fart in M1 and slowly revving up to 4-5K RPM and the shift. Sometimes it works also from M2 to M3 but a lot quieter.

[wrxkyle]

If you're asking me if my RPM goes up after shifting on Stage 2 tune, yes, because I know my tune is not that great.

i think he's asking does rpm continue to rise during the shift. the farts come from pulling timing/spark vs fuel cut(more dangerous) the car has to remove torque, though only briefly, to shift and not excessively wear on the trans/clutches 24/7, vag does this through cutting/pulling timing which causes the fart, without closing the throttle. if the fart isn't there then either the trans is in launch mode (at least on my giac tcu tune) and going full bore on the shifts for fastest accel or the car isn't properly cutting the timing/spark. if spark is still going and the throttle is still open you might expect to see a slight spike in rpm's while shifting shifts happen pretty fast so this will be hard to see without logging i'd think.

[Phantom_AudiS4]

I have a similar issue...

The mechatronics and harness was replaced and the gearbox issues were resolved - since then I don't get the DSG fart noise, I can only seem to make the noise when: in manual, 1st gear, throttle 15% and shift to 2nd at 4000rpm.

The car is stock (ECU & TCU) and shifts gear perfectly but without the 'fart' noise.

Have there been any new findings on this ??

[LYKUNO]

I thought I had read a rumor that Audi had introduced new software that would eliminate the fart in the interest of improving emissions. Wish I could remember where I saw that, but I do believe my stock 2011 used to fart (pleasantly so) during its earlier years, but then at some point, it just sort of faded away. It could be that a software update was introduced to the car when it was in at the dealer for scheduled maintenance that eliminated or reduced the sound.

Meanwhile, I did see this tech article that was somewhat enlightening.

Finally, one out of many videos of Audis and VWs :
(Doesn't help listening to the seatbelt warning chime on ths one.)

[SForePlayin']

https://www.youtube.com/watch?v=CIDo2DKAMfk&t=289s

[Phantom_AudiS4]

I thought I had read a rumor that Audi had introduced new software that would eliminate the fart in the interest of improving emissions. Wish I could remember where I saw that, but I do believe my stock 2011 used to fart (pleasantly so) during its earlier years, but then at some point, it just sort of faded away. It could be that a software update was introduced to the car when it was in at the dealer for scheduled maintenance that eliminated or reduced the sound.

Meanwhile, I did see this tech article that was somewhat enlightening.

Finally, one out of many videos of Audis and VWs :
(Doesn't help listening to the seatbelt warning chime on ths one.)

Thanks for this, I think you might be correct about the emissions changes. That article sums it up nicely