997.2 engine suddenly died at stoplight
Pro
Joined: Jan 2013
Posts: 506
Likes: 22
From: Edmonton, AB
How much time passed from when you started the car to when the car died at the stoplight?
Had you driven it shortly before the trip when this happened. I’ve heard of this happening on 997.2s about a half dozen times including my own car.
My conditions were when I started a short 10 minute drive to parking it for maybe two minutes. Then starting and rolling to a stop sign 45 seconds later. It died at the stop sign. Same Christmas tree light show. It then cranked right up again and no problems ever since. That was two years ago. I was on an old battery and since changed it but think it has more to do with the car running too rich on the start up thinking it needed to heat the cats. Probably something to do with heat soak but that’s just an educated guess.
No idea if my situation mirrors yours but it’s one data point for you.
Had you driven it shortly before the trip when this happened. I’ve heard of this happening on 997.2s about a half dozen times including my own car.
My conditions were when I started a short 10 minute drive to parking it for maybe two minutes. Then starting and rolling to a stop sign 45 seconds later. It died at the stop sign. Same Christmas tree light show. It then cranked right up again and no problems ever since. That was two years ago. I was on an old battery and since changed it but think it has more to do with the car running too rich on the start up thinking it needed to heat the cats. Probably something to do with heat soak but that’s just an educated guess.
No idea if my situation mirrors yours but it’s one data point for you.
https://www.snopes.com/fact-check/cone-of-silence/
Throwing my vote in with the "it could be anything" group.
Thread Starter
Pro
Joined: Nov 2002
Posts: 551
Likes: 94
Nothing yet, dealer has it since friday but couldn't look at it till yesterday. and no luck, there are no codes and haven't had a chance to duplicate the problem. Nothing is obvious to them. The shop foreman is going to take it home today and have an opportunity to drive it extensively and report tomorrow. Yep, it could be anything!! in the meantime, have a sweet Pepper loaner, 2018 V6 turbo, and wow.
Rennlist Member
Joined: Apr 2007
Posts: 8,570
Likes: 1,114
From: Florida
Slightly different scenario, but you reminded me of the old car-dies-when-buying-vanilla-ice cream-issue:
https://www.snopes.com/fact-check/cone-of-silence/
Throwing my vote in with the "it could be anything" group.
https://www.snopes.com/fact-check/cone-of-silence/
Throwing my vote in with the "it could be anything" group.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look
Verdad Gallardo
10 Porsche Colors That Have More Personality Than Most People
Verdad Gallardo
Drifting
Joined: Feb 2005
Posts: 2,248
Likes: 414
From: Coachella Valley
8 years out of a Battery is exceptional - most fail at almost exactly 5 years. The only vehicle I've seen batteries consistently last longer in is the Cayenne, where the box is located under the front driver's seat so they stay super clean, stay cooler in the summer and warmer in the winter, but it's not the easiest thing to change quickly - good thing there are jump posts under the hood.
Thread Starter
Pro
Joined: Nov 2002
Posts: 551
Likes: 94
Nordschleife Master
Joined: Mar 2004
Posts: 8,391
Likes: 449
From: Southwest
Rennlist Member
Joined: Oct 2014
Posts: 6,168
Likes: 1,932
Advanced
Joined: Mar 2017
Posts: 92
Likes: 10
From: Katy Texas
I have a 2010 997.2 C4S with about 65K miles on it now. For the ENTIRE time I have had it, and I mean when it was brand new, I have had an ongoing glitch with the engine shutting off while pulling away from a parking spot. The dealer can't figure it out. No one can. It's not repetitive (like taking it to the dealer to show them) and it's not dangerous. It only happens a few times a year. The conditions are it has to be warm outside (over 80), and the car has been driven within the last hour. If it's parked more than an hour, never happens. Even if the conditions are right, still will only do it once every 20 times. When it does do it, I am usually running errands and have stopped for 30-45 minutes. Then when I am leaving, and I push in the clutch coasting up to a stop sign, etc all the lights come on, the engine has shut off. I just twist the key to far left to reset, and recrank. Fires right up perfectly, no more problem. Months pass, does it again. The dealer can't explain it. When I try to give them details, they just **** their head over like a chicken watching a card trick. No idea where to start since it never throws a code. I have just learned to live with it, and halfway expect it when conditions are right. Weird but true....
Advanced
Joined: Mar 2017
Posts: 92
Likes: 10
From: Katy Texas
Believe me that's been discussed. About all we can figure is that the hot temps combined with the car sitting for a relatively short period of time combines to create a vacuum or vapor related issue causing the engine to literally stop after about 30 seconds of running. Always happens in the first 30-60 seconds under load. I can idle after starting it forever and it idles fine. Under load it will trip. I have a Durametric and have thought about trying to record what's happening in that time frame, but there are so many things to choose it would take a lifetime to catch the right one.