Has anybody with the issue put their car on a dyno to offer some empirical evidence of an issue? Not that I doubt it, but it would certainly help your cause with PCNA.

 

No stumble on my 2014 911S. Keep the revs high always and I don't see 2500 RPM on highway much! Hope you get your car fixed soon. Porsche has always been about high revs. Enjoy the ride!

 

But what about driving off the highway?

I'm really intrigued by people who say "just drive with high RPMS". Don't you ever encounter a stop sign? Or traffic lights? Or a 25mph neighborhood?

Not trying to be snarky - I'm quite genuinely curious. Do you just go directly from your house onto the highway then back?

 

Always keep the revs high but never stumble. Even on the surface roads I keep it over 2,500. Only when I screw up with the clutch and even then it starts itself again. So best of luck and hope you solve the problem. I also only use 91 octane.

 

I must have missed that section in the operating manual or when I skipped over the small print...

 

Wow, I'm sorry to read about this problem that many forum members are being burdened with.

So far I haven't had this issue. I have a 2013 C2S-MN and normally drive in the Sport-plus mode. I've always used Sunoco 93-Octane fuel and did follow the recommended break-in procedure.

I also had the Dual-path Exhaust System installed.

I notice my car idles slightly higher than six-hundred RPMs at normal operating temperature and increases approximately one-hundred-fifty RPMs when Sport-plus Mode is engaged.

I hope someone comes up with a solution for the "Stumbling" problem.

 

Thx Tina - Fortunately we now have enough owners where Porsche can no longer elect to deal with us in isolation (and continue dismiss our legitimate grievances) and are running the very real risk of facing a collective lawsuit.

Apparently their arrogance knows no bounds and as much as they continue to frustrate and ignore this known issue, it will not go away.

 

dux Anything new to report from either Porsche dealers or PCNA? This issue seems to be losing traction. Still one of the lucky ones with no stumble issue but concerned. Thanks.

 

As of this morning there were 36 survey responses with every imaginable permutation.
I'm still waiting for some more stumbling respondents of the poll to complete the survey. Subtle reminders have been sent out pleading for their participation.

Preliminary discussions with PCNA have resulted in preposterous responses such as;
"We can't compare a MT stumble to a PDK stumble because they re completely different cars."
"All MT's stumble at 2500rpm."
"The (MT) car is adapting to your driving style."

Certainly not losing traction, just patiently lining up our ducks as their methods of denial and excuses are well documented.

 

Wow, some sweet responses. Love the "adapting to your driving style". Yeah we drive so that the car purposely stumbles. Crazy, simply nuts. Step up Porsche, take responsibility and fix this problem. Ridiculous!

 

That was my favorite one. It was the first excuse given to me. The service rep said I just needed to drive the car more. :-/ At 8500 miles and it's getting worse. Yeah, that helped. I'm sure it's still "adapting".

 

Yes, I know. Comical, insulting, arrogant and the list goes on.

I reaffirmed their absurd comment and said that I was under the impression that this adaptation occurred primarily with PDK shift points.

Oh no no no.. It happens with all cars...

When they have 25 Lemon Laws hitting them in the same week, perhaps they'll comprehend the gravity of the situation.

They have a choice, however, I suspect they'll make the wrong one.

 

The thing I'm learning about this as I've been looking closer is that at first I was desensitized to the problem and didn't really notice because I was so used to "turbo lag" from an Audi I had been driving previously.

I found that my driving technique (just street) was that I tended not to bring the rev's up so quickly.. when you have that you just sort learn and subconsciously you don't slam the throttle wide open as fast.

And I carried this over to driving other cars such as my 911.. So i really wasn't seeing the problem initially. But now as I am as I'm DD'ing mine and driving a bit more aggressive it is much more noticeable.

My point being that even a subtle thing as how you drive can mask the problem with the car. That said... I wouldn't go as far as Porsche does as suggesting that it should be necessary to drive a NA 911 like you would an older Audi with Turbo lag..

 

Well thanks for all the work. I sent in the survey awhile ago. Since I only have 1200 miles on mine, I guess I still need to pay attention to whats going on.
DUX: how many in the surveys had the problem creep up on them AFTER they had it for awhile as opposed to those who had it from the beginning.
I think we can learn a thing or 4 from the BBQ motors in the GT3 and how Porsche solved that.

 

Filled it out. Though my guess is the problem has been there all along, not at 5k miles like I wrote. That's when I looked for it when it started coming up on the forums. It's there for sure. I think the dyno idea is great...expect a drop off at 2500.