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I'm sick...think my car is developing "The Stumble"

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Old 07-25-2017, 08:07 AM
  #136  
stealthboy
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Originally Posted by ettenw
I've got a 2016 981S that's had the problem since day 1. I'll be trying the O2 fix, but this (and PCNA's lousy customer service) makes me wonder if there isn't an emission issue here. After diesel-gate I wouldn't put anything past these guys. Anyone have the ability to do an actual emissions test like the one that identified the diesel cheaters?
Well this just got interesting.

But honestly I feel like if that were the case, then *everyone* would have the stumble.
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Old 07-25-2017, 08:53 AM
  #137  
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I hope some of you guys, that had the stumble well documented with your local dealership, write a well crafted and compelling letter to PCNA, and get reimbursement for this DIY repair.
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Old 07-25-2017, 09:03 AM
  #138  
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I would like to see some more "stumble sufferers" complete this fix to truly confirm it's been resolved here on a wider sample.
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Old 07-25-2017, 11:11 AM
  #139  
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I might have to do this at 80K when the bumper comes off again.
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Old 07-27-2017, 02:15 PM
  #140  
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Originally Posted by ChicagoSpeed996
Alright, pfan! the next guinea pig. How about you stealth boy? With three data points (plus the previous one I read somewhere) that makes a line on a graph! This is SWAG science at it best! Look out, I'm about to do science!!
Great contribution to the community. Thanks so much.
I also have a 997.2 and would like to try this fix. Can you please post a link to the exact part you bought?
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Old 07-28-2017, 10:08 AM
  #141  
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Is the problem with a certain lot of 02 sensors?

If so, how do we ID the good from the bad?
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Old 07-28-2017, 11:17 AM
  #142  
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Originally Posted by yorkmed
Is the problem with a certain lot of 02 sensors?

If so, how do we ID the good from the bad?
We have two (maybe three) cases of this being the solution. I'm not yet ready to call this solved, but it certainly looks promising. We have vehicles with the stumble in many different years, so I'm not sure how it could just be a bad batch of O2 sensors.
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Old 07-31-2017, 09:48 AM
  #143  
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Parts arriving today.
Will replace by the end of this week and report back...
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Old 07-31-2017, 12:46 PM
  #144  
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Originally Posted by duxsi
Parts arriving today.
Will replace by the end of this week and report back...
Awesome! Another data point!
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Old 07-31-2017, 08:41 PM
  #145  
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I have also received the parts. I am away on vacation this week but I will be starting the replacement Sunday. Looking forward to it!
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Old 07-31-2017, 08:49 PM
  #146  
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Good luck guys!!
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Old 07-31-2017, 08:56 PM
  #147  
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Maybe they aren't "bad" as such, but foul quicker than the engineers intended?
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Old 08-01-2017, 09:46 AM
  #148  
ChicagoSpeed996
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Dude, I think you are completely correct. That is my theory as well. They don't throw codes because they are reading and not failed. Oxygen sensors can drift or become fouled over time and not read as correct as they once did.
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Old 08-01-2017, 01:12 PM
  #149  
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Originally Posted by Dude174
Maybe they aren't "bad" as such, but foul quicker than the engineers intended?
I don't know - My 2013 started developing the stumble in 2013. I took delivery in May, and I have in my service records an appointment at my dealer in September complaining about the stumble.
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Old 08-01-2017, 01:22 PM
  #150  
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Originally Posted by ChicagoSpeed996
Dude, I think you are completely correct. That is my theory as well. They don't throw codes because they are reading and not failed. Oxygen sensors can drift or become fouled over time and not read as correct as they once did.
Argeed!

I'm looking forward to seeing if the new parts resolve the issue for you guys.
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