991.1 GTS AMC0 DME & TCU recall -Don't do it
12-16-2022, 06:29 PM
#1
Rennlist Member
Thread Starter
991.1 GTS AMC0 DME & TCU recall -Don't do it
I regrets to have done AMC0 DME & TCU recall for my 2016 991.1 GTS today. I had gone to the deanship to buy something and they informed me that there is a pending open recall which would take 30 min to get it done. So I said ok. got the car back and immediately felt something different. Car was lot less aggressive and wild at shift points as well as sound. I do not like the outcome at all. If you have a 991. GTS (PDK) please don't do this recall.
I looked at some old post that states the above upgrade will make Sport+ more useful on the street, however in my experience even normal and sport modes feel really less fun
.
Is there a way to undo this?
I looked at some old post that states the above upgrade will make Sport+ more useful on the street, however in my experience even normal and sport modes feel really less fun
. Is there a way to undo this?
Last edited by chamilka; 12-16-2022 at 06:38 PM.
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12-16-2022, 10:35 PM
#4
Rennlist Member
Yeah, it just reset the learned "recent driver behavior" values to their defaults as part of the update. They will be back.
Anyone who can show a loss of performance with before/after dyno plots can (and should) take Porsche to court, and win.
Anyone who can show a loss of performance with before/after dyno plots can (and should) take Porsche to court, and win.
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Chuck245 (12-19-2022)
12-18-2022, 09:14 AM
#5
Rennlist Member
Un-neutered PDK FTW.
They wouldn’t be trying to pay me $200, ten years after the car was built, if it was to my benefit.
They wouldn’t be trying to pay me $200, ten years after the car was built, if it was to my benefit.
Last edited by AdamSanta85; 12-18-2022 at 09:19 AM.
12-18-2022, 04:11 PM
#6
Rennlist Member
It doesn't neuter anything. It changes some shift points to make them more usable for 95% of drivers.
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12-26-2022, 07:55 AM
#8
Rennlist Member
Did Porsche tell you that’s what it does? All I’ve seen officially is it was ordered by the EPA not Porsche. There been a fair amount of hearsay from owners who did the one way recall though.
Last edited by AdamSanta85; 12-26-2022 at 08:01 AM.
12-26-2022, 09:36 AM
#9
FWIW my service manager says that it remaps the 991.1 PDK shift points to match that of the 991.2.
Unless you have your foot into the throttle it drops the shift points so that it meets the EPA requirements.
If you are on the track the 991.1 responds exactly the same as the 991.2 PDK with respect to shifting and holding gears.
Having driven a 991.1 pdk with the reflash it drives exactly the same as my 991.2 pdk, where as before it was always holding the gears which corresponds to how others have described the changes and what the service manager relayed.
FWIW I find that it is possible to drive in Sport Plus with a 991.2 PDK versus the 991.1 PDK (in sport plus) in traffic.
Unless you have your foot into the throttle it drops the shift points so that it meets the EPA requirements.
If you are on the track the 991.1 responds exactly the same as the 991.2 PDK with respect to shifting and holding gears.
Having driven a 991.1 pdk with the reflash it drives exactly the same as my 991.2 pdk, where as before it was always holding the gears which corresponds to how others have described the changes and what the service manager relayed.
FWIW I find that it is possible to drive in Sport Plus with a 991.2 PDK versus the 991.1 PDK (in sport plus) in traffic.
Last edited by thesaintusa; 12-26-2022 at 09:39 AM.
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12-26-2022, 12:50 PM
#10
Rennlist Member
That's my point, really... I think if you were to ask ten 991.2 owners if they would prefer the 991.1 Sport Plus programming, nine of them would tell you to leave their cars alone. It's not that common to want to hold a gear to redline under part throttle, and for those occasions where it's appropriate, there's always manual mode.
The change was not ordered by the EPA, but resulted from a civil suit brought by people whoobjected to Porsche testing one thing and selling something else saw an opportunity for a big payday. It is still considered 'voluntary' AFAIK, in that nobody who has declined it has been denied renewal of their registration.
The change was not ordered by the EPA, but resulted from a civil suit brought by people who
Last edited by Noah Fect; 12-26-2022 at 12:52 PM.
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Chuck245 (12-26-2022)
12-26-2022, 01:10 PM
#11
Rennlist Member
The change was not ordered by the EPA, but resulted from a civil suit brought by people who objected to Porsche testing one thing and selling something else saw an opportunity for a big payday. It is still considered 'voluntary' AFAIK, in that nobody who has declined it has been denied renewal of their registration.
12-26-2022, 01:12 PM
#12
Nordschleife Master
That's my point, really... I think if you were to ask ten 991.2 owners if they would prefer the 991.1 Sport Plus programming, nine of them would tell you to leave their cars alone. It's not that common to want to hold a gear to redline under part throttle, and for those occasions where it's appropriate, there's always manual mode.
The change was not ordered by the EPA, but resulted from a civil suit brought by people whoobjected to Porsche testing one thing and selling something else saw an opportunity for a big payday. It is still considered 'voluntary' AFAIK, in that nobody who has declined it has been denied renewal of their registration.
The change was not ordered by the EPA, but resulted from a civil suit brought by people who
12-26-2022, 01:18 PM
#13
Rennlist Member
Could be. They are part and parcel of the same offer for reimbursement from the class-action settlement (you get an extra $200 or so for completing the recall.) Got a link to the EPA order?
12-26-2022, 01:23 PM
#14
Drifting
I did the recall on my 991.1 GTS months ago. Can't tell any difference other than shift points in Sport Plus are different and more street usable at less than full throttle.
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12-26-2022, 01:29 PM
#15
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https://www.reuters.com/article/us-v...-idUSKBN25K13P
HAMBURG/MUNICH (Reuters) - Germany's motor vehicle authority KBA is investigating Volkswagen's VOWG_p.DE luxury sports vehicles unit Porsche AG over the suspected manipulation of petrol engines to achieve improved emissions data.
Porsche over the suspectedA KBA spokesman said on Monday the investigation involved petrol engines that Porsche produced for the European market before 2017.
Porsche had confirmed a newspaper report on Sunday that it had informed the authorities after internal investigations uncovered suspected irregularities.
German prosecutors fined Porsche 535 million euros ($632 million) last year for lapses that allowed the company to cheat diesel emissions tests, but manipulation has not yet been proven for petrol engines.
A Porsche spokesman on Sunday said the issues related to vehicles developed several years ago, adding there were no indications that current production was affected. The carmaker was working closely with authorities, he added.
Bild am Sonntag weekly had reported that the investigation was focused on engines developed between 2008 and 2013, including those of the Panamera and 911 models, with suspected illegal changes to hardware and software that could affect exhaust systems and engine components.
The paper also said that apart from discussions with employees, evidence was also being sought in the minutes of company meetings and hundreds of thousands of emails.
A spokesman for Audi NSUG.DE, Volkswagen's premium division, said there were no indications that the issues identified at Porsche also existed with regard to Audi components.
“Audi AG is constantly and continuously reviewing technical and regulatory aspects of various vehicle types,” the spokesman said in emailed comments.
($1 = 0.8460 euros)
Porsche over the suspectedA KBA spokesman said on Monday the investigation involved petrol engines that Porsche produced for the European market before 2017.
Porsche had confirmed a newspaper report on Sunday that it had informed the authorities after internal investigations uncovered suspected irregularities.
German prosecutors fined Porsche 535 million euros ($632 million) last year for lapses that allowed the company to cheat diesel emissions tests, but manipulation has not yet been proven for petrol engines.
A Porsche spokesman on Sunday said the issues related to vehicles developed several years ago, adding there were no indications that current production was affected. The carmaker was working closely with authorities, he added.
Bild am Sonntag weekly had reported that the investigation was focused on engines developed between 2008 and 2013, including those of the Panamera and 911 models, with suspected illegal changes to hardware and software that could affect exhaust systems and engine components.
The paper also said that apart from discussions with employees, evidence was also being sought in the minutes of company meetings and hundreds of thousands of emails.
A spokesman for Audi NSUG.DE, Volkswagen's premium division, said there were no indications that the issues identified at Porsche also existed with regard to Audi components.
“Audi AG is constantly and continuously reviewing technical and regulatory aspects of various vehicle types,” the spokesman said in emailed comments.
($1 = 0.8460 euros)
Anyway, Porsche, IMO, should be clear about the actual changes, other than "TCU/DME flash and throttle calibration for emissions reasons." and leave it to the owners to speculate.
It's not even the upshift strategy I would be worried about the but the downshift. The original Sport+ downshift strategy in Auto on the track is amazing. It's much more aggressive keeping RPM high than I would be with the paddles. The 911.1 need the RPM much more than the torquey 991.2 3.0TT.
Last edited by AdamSanta85; 12-26-2022 at 01:34 PM.