What is the current state of the 'engine stumble' issue?
#16
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Location: Chicagoland Area
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PoweKit C2S here with 7 MT.
My power delivery is as smooth as a fresh jar of Skippy.
2014. Over 24,000 miles.
*has PSE
**by the book break in
*** 1st oil change at 1,000 miles
My power delivery is as smooth as a fresh jar of Skippy.
2014. Over 24,000 miles.
*has PSE
**by the book break in
*** 1st oil change at 1,000 miles
Last edited by LexVan; 12-12-2015 at 12:46 AM.
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Goldenappple (12-28-2022)
#19
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Sometimes I feel something in the drivetrain, like I spun over something in the road, and maybe that is all it is but it does happen from time to time. It feels like the car shuts off for about a millisecond.
#20
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Haven't noticed it in my PDK C2S.
#21
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or maybe it is my imagination. The car runs like a scalded dog. I like the reaction I get from my sons the first time they experience the extreme g force. That is well worth the price of admission.
#25
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2013 C4s manual stumbles between 2,000 and 3,000 RPM after that is fine.
#26
Burning Brakes
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Mine still stumbles. It's bad. I've been posting about it over on the other forum. Stumble is usually at 2500 RPM, but with a big stumble when accelerating through 3000 RPM. On moderate acceleration I get stumbling throughout the 2-3K RPM range. Seems to be worse with humid weather, and on first drive. If I drive for a half hour, stop the car for a half hour, then drive again it seems to be better. Had a PCNA regional tech drive the car and just told me it was "normal" due to all the sensors and transitions going trying to deliver torque.
I disbelieve and still have a hard time driving the car because each drive just upsets me. Merging on to a highway should not having me lurching and stumbling to accelerate up to speed.
It's not a PDK issue. Mine is manual. Car runs very well above 3200 RPM.
I stopped posting about it here because too many people here just told me I was driving it wrong.
Edit: Here is the detailed summary I typed up for my latest dealer visit about this: https://i.imgur.com/EAYEEwF.jpg
I disbelieve and still have a hard time driving the car because each drive just upsets me. Merging on to a highway should not having me lurching and stumbling to accelerate up to speed.
It's not a PDK issue. Mine is manual. Car runs very well above 3200 RPM.
I stopped posting about it here because too many people here just told me I was driving it wrong.
Edit: Here is the detailed summary I typed up for my latest dealer visit about this: https://i.imgur.com/EAYEEwF.jpg
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Ducaiti999 (03-11-2022)
#28
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Here's the update..
Affected cars developed this problem at different times. 2k, 4k, etc
Affects C, CS and X51.
Affects PDK's and manuals alike.
Tried fuel additive.
Tried a multitude of gasoline brands.
Tried no ethanol gasoline.
Tried 100 octane. (expensive)
Tried TPS resets.
Tried having a conversation with PCNA based on logic (which was a sad spectacle).
The reality is that they don't give a damn because the Kool-aid keeps selling.
An owner in Hong Kong said that a plenum solved his stumble.
No one has yet to attempt replicating his plenum solution...but I'm open to crowdfunding.
50 members @ $20 = $1000
Affected cars developed this problem at different times. 2k, 4k, etc
Affects C, CS and X51.
Affects PDK's and manuals alike.
Tried fuel additive.
Tried a multitude of gasoline brands.
Tried no ethanol gasoline.
Tried 100 octane. (expensive)
Tried TPS resets.
Tried having a conversation with PCNA based on logic (which was a sad spectacle).
The reality is that they don't give a damn because the Kool-aid keeps selling.
An owner in Hong Kong said that a plenum solved his stumble.
No one has yet to attempt replicating his plenum solution...but I'm open to crowdfunding.
50 members @ $20 = $1000
![surrender](https://rennlist.com/forums/graemlins/surrender.gif)
#29
Rennlist Member
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Here's the update..
Affected cars developed this problem at different times. 2k, 4k, etc
Affects C, CS and X51.
Affects PDK's and manuals alike.
Tried fuel additive.
Tried a multitude of gasoline brands.
Tried no ethanol gasoline.
Tried 100 octane. (expensive)
Tried TPS resets.
Tried having a conversation with PCNA based on logic (which was a sad spectacle).
The reality is that they don't give a damn because the Kool-aid keeps selling.
An owner in Hong Kong said that a plenum solved his stumble.
No one has yet to attempt replicating his plenum solution...but I'm open to crowdfunding.
50 members @ $20 = $1000![surrender](https://rennlist.com/forums/graemlins/surrender.gif)
Affected cars developed this problem at different times. 2k, 4k, etc
Affects C, CS and X51.
Affects PDK's and manuals alike.
Tried fuel additive.
Tried a multitude of gasoline brands.
Tried no ethanol gasoline.
Tried 100 octane. (expensive)
Tried TPS resets.
Tried having a conversation with PCNA based on logic (which was a sad spectacle).
The reality is that they don't give a damn because the Kool-aid keeps selling.
An owner in Hong Kong said that a plenum solved his stumble.
No one has yet to attempt replicating his plenum solution...but I'm open to crowdfunding.
50 members @ $20 = $1000
![surrender](https://rennlist.com/forums/graemlins/surrender.gif)
similar (in fact more sophisticated than) IPD plenum... ymmv
#30
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When I referenced his problem to PCNA (after he turned the car in for a GT3), their response was "He obviously wasn't driving the car properly".
Not sure where exactly you go when faced with such an idiotic comment...