Notices
993 Forum 1995-1998

Stalling Issues

Thread Tools
 
Search this Thread
 
Old May 26, 2012 | 06:48 AM
  #1  
CamsPorsche's Avatar
CamsPorsche
Thread Starter
Race Car
15 Year Member
 
Joined: Apr 2009
Posts: 4,503
Likes: 598
From: Taxronto
Default Stalling Issues

Help!

I've tried searching for what's happening but all I can see are threads where the car stalls at stop lights, stalls decelerating, or rpm idle issues.

On Friday I started up my car and let it sit for 5 mins to warm up when it just stopped. I started it back up again and no stalling. Pulled onto the main roadway and after I shifted into 3rd there was a strange loss of power for a millisecond and then all good.

This morning I turn on the car again, let it warm up for 5 mins and again it dies. But has run fine since.

I'm thinking perhaps time to replace the spark plugs considering the loss of power above?

Other than these occurrences the car runs fine. What could it be?
Reply
Old May 26, 2012 | 08:13 AM
  #2  
randytrish's Avatar
randytrish
Rennlist Member
15 Year Member
 
Joined: Sep 2006
Posts: 336
Likes: 3
From: King, NC
Default

I don't believe it's your plugs. I would start with replacing your DME relay.
Randy
Reply
Old May 26, 2012 | 08:27 AM
  #3  
jakfrost's Avatar
jakfrost
Racer
 
Joined: Apr 2011
Posts: 437
Likes: 0
From: Alexandria Ont.
Default

+1 on the DME relay...have a friend's you could borrow/swap for a ride?
Reply
Old May 26, 2012 | 08:56 AM
  #4  
firesm's Avatar
firesm
Pro
 
Joined: Sep 2009
Posts: 658
Likes: 0
From: Ottawa,Ontario
Default

For sure, swap out the DME relay to see if that solves the problem first. If it doesn't, next step would be to check the ground strap - if it's the original exposed braided style it might be rusted/corroded and making an intermittent connection. It seems like a lot of people have been experiencing issues with that lately - it's an age related thing.
Reply
Old May 26, 2012 | 09:03 AM
  #5  
Elonash's Avatar
Elonash
Instructor
 
Joined: Aug 2009
Posts: 124
Likes: 14
From: Lyon, France
Default

After DME you want to check crankshaft angle position sensor (TDC sensor in english I believe)
Reply
Old May 26, 2012 | 12:26 PM
  #6  
billapo's Avatar
billapo
Advanced
 
Joined: Oct 2011
Posts: 79
Likes: 0
Default

I had very similar problem. I had the cold crank sensor replaced and the car runs great.
Reply
Old May 26, 2012 | 12:28 PM
  #7  
billapo's Avatar
billapo
Advanced
 
Joined: Oct 2011
Posts: 79
Likes: 0
Default

Also, the fuel pump tested ok and the fuel relay was replaced as well.
Reply
Old May 26, 2012 | 01:50 PM
  #8  
CamsPorsche's Avatar
CamsPorsche
Thread Starter
Race Car
15 Year Member
 
Joined: Apr 2009
Posts: 4,503
Likes: 598
From: Taxronto
Default

Guys many thanks for the replies.

Do you think the intermittent power loss and the stalling are connected?
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

 Verdad Gallardo
story-1

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
story-2

10 Porsche Colors That Have More Personality Than Most People

 Verdad Gallardo
story-3

Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

 Verdad Gallardo
story-4

10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

 Joe Kucinski
story-5

Porsche Shakes Up The Nürburgring Lap Record Table Once Again

 Verdad Gallardo
story-6

6 Ways the Porsche 911 GT3 S/C Redefines Performance

 Joe Kucinski
story-7

10 Wildest Homologation Specials Porsche Ever Sold

 Verdad Gallardo
story-8

Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

 Verdad Gallardo
story-9

10 Porsche Opinions That Can Start a Fight

 Joe Kucinski
Old May 26, 2012 | 02:04 PM
  #9  
firesm's Avatar
firesm
Pro
 
Joined: Sep 2009
Posts: 658
Likes: 0
From: Ottawa,Ontario
Default

Originally Posted by CamsPorsche
Guys many thanks for the replies.

Do you think the intermittent power loss and the stalling are connected?
Makes sense - especially if both issues started happening around the same time
Reply
Old May 26, 2012 | 03:18 PM
  #10  
TMc993's Avatar
TMc993
Rennlist Member
20 Year Member
 
Joined: Nov 2005
Posts: 3,782
Likes: 672
From: Dahlonega, Georgia
Default

A friendly "for what it's worth"......Starting these cars and letting them sit at idle to "warm up" isn't good for the engine. Factory warm-up procedure is start, let idle 20-30 seconds until oil pressure builds, then drive off, avoid WOT run-ups until the oil is at proper operating temp and oil is circulating through the oil tank, then drive it like you stole it. Warm-up at idle probably has nothing to do with your stalling problem, but nonetheless is not good for your engine.
Reply
Old May 26, 2012 | 05:15 PM
  #11  
pcarhiway's Avatar
pcarhiway
Rennlist Member
10 Year Member
 
Joined: Sep 2011
Posts: 764
Likes: 198
Default DME Relay

Cam,

The DME relay was replaced in October,2011 just prior to the Rennsport trip.

There should also be two new DME relays in the glovebox.

Good luck chasing down the ghost,

Bruce
Reply
Old May 27, 2012 | 07:06 AM
  #12  
CamsPorsche's Avatar
CamsPorsche
Thread Starter
Race Car
15 Year Member
 
Joined: Apr 2009
Posts: 4,503
Likes: 598
From: Taxronto
Default

Next stop was the glove box! I remembered you had mentioned something about the extra DME's.

Thanks Bruce. I'll give it a go later today.
Reply
Old Jun 6, 2012 | 11:55 AM
  #13  
boman993's Avatar
boman993
Rennlist Member
15 Year Member
 
Joined: Jun 2009
Posts: 2,922
Likes: 218
From: Canada
Default

Originally Posted by CamsPorsche
Next stop was the glove box! I remembered you had mentioned something about the extra DME's.

Thanks Bruce. I'll give it a go later today.
Hey Cam did you end up solving this issue? I drove the C4S to the office today
and had a stall at a light..rpm guage bounced slightly at idle under 1k..then
died out. Freaked the hell out of me!! I have an extra DME so I'll give that a
shot if the problem happens again on the way home ...I hope it's nothing more
serious.
Reply
Old Jun 6, 2012 | 01:35 PM
  #14  
CamsPorsche's Avatar
CamsPorsche
Thread Starter
Race Car
15 Year Member
 
Joined: Apr 2009
Posts: 4,503
Likes: 598
From: Taxronto
Default

Hey Jakob - my car has run fine since I posted this so I've held off on replacing the DME. Odd indeed. Its now in the shop on a lift awaiting the rear shock mounts and Walrod bushings to arrive. Front coilovers already installed and a trick new 6-speed shift **** and boot which is guaranteed to make the car faster!

As everyone stated above I'd replace it first and then see if the car dies again.
Reply
Old Jun 6, 2012 | 03:24 PM
  #15  
Beretta's Avatar
Beretta
Instructor
 
Joined: May 2012
Posts: 156
Likes: 0
From: Sweden
Default

Maybe we should do a checklist for this kind of problem?

So you can try them, one by one, until the problem is solved?

1: DME
2: Cold crank sensor
3:...
4:...
Reply



All times are GMT -3. The time now is 10:57 AM.

story-0
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

Slideshow: Porsche has created a Japan-only 911 GT3 Artisan Edition that blends track-ready hardware with design cues inspired by traditional Japanese craftsmanship.

By Verdad Gallardo | 2026-04-28 19:37:40


VIEW MORE
story-1
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE
story-2
10 Porsche Colors That Have More Personality Than Most People

Slideshow: Porsche's wildest paint colors aren't just shades-they're full-blown personalities on four wheels.

By Verdad Gallardo | 2026-04-27 19:38:13


VIEW MORE
story-3
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

Slideshow: The last of the Speedsters doesn't just close a chapter, it makes quite the bold, air-cooled statement.

By Verdad Gallardo | 2026-04-22 17:55:04


VIEW MORE
story-4
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

Slideshow: Going to a Porsche dealership may not be the dream experience you expect it to be and these are the reasons why.

By Joe Kucinski | 2026-04-21 13:54:19


VIEW MORE
story-5
Porsche Shakes Up The Nürburgring Lap Record Table Once Again

Slideshow: Porsche just proved-again-that precision engineering can outrun brute force at the Nürburgring.

By Verdad Gallardo | 2026-04-18 20:27:02


VIEW MORE
story-6
6 Ways the Porsche 911 GT3 S/C Redefines Performance

Slideshow: Six reasons why you will love the Porsche 911 GT3 S/C and 1 reason you will hate it.

By Joe Kucinski | 2026-04-14 10:21:39


VIEW MORE
story-7
10 Wildest Homologation Specials Porsche Ever Sold

Slideshow: Some of the most desirable Porsche models are those that were sold to the public solely for homologation purposes.

By Verdad Gallardo | 2026-04-08 09:54:26


VIEW MORE
story-8
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

Slideshow: The lone BTR III-spec Targa features rare RUF engineering with a 430-hp turbo flat-six and fewer than 30 miles since its rebuild.

By Verdad Gallardo | 2026-04-06 20:03:25


VIEW MORE
story-9
10 Porsche Opinions That Can Start a Fight

Slideshow: If you want to start a debate with a Porsche friend, these 10 opinions are a great way to get started.

By Joe Kucinski | 2026-04-02 16:53:02


VIEW MORE