Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 1
991 : 2011-2019 0
997 : 2004-2012 1
996 : 1997-2005 31
993 : 1993-1998 5
964 : 1989-1993 2
Carrera 3.2 : 1983-1989 3
Carrera SC : 1977-1983 1
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 22
Cayman : 2005- 14
Cayenne : 2003- 2
Macan : 2014- 2
Panamera : 2009- 1
912-914-924-928-944-968 1
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
michaelbbwalker
Trainee


Joined: 23 Nov 2016
Posts: 84
Location: Cardiff

2005 Porsche 997 Carrera 2S

PostPosted: Tue Jan 22, 2019 10:25 pm    Post subject: coil packs? starter? argh!! Reply with quote

hi folks...
yet another "what is wrong based on symptoms XYZ..." thread...

so a while back when I was driving the car, pressing on, I suddenly experienced a jolt / jerking, I would say around between 3-5k RPM.

I have also had a few times recently, where I get home, and switch off to unload the car, when I try and start it up, it wont fire (turns over OK though), took a few attempts and some light pressing of the accelerator too.
I also had this unpleasant kind of grindy noise a little bit while attempting to start it, it did eventually fire.

so having read half the internet, my initial feeling on the jolt and jerkiness was coil packs, they are probably ancient. Sparks, I don't know when they were last changed but I am thinking quite a while...

the hot start problem, I have just checked and I had a new starter motor and alternator battery harness thingy fitted when the engine was rebuilt around 3 years ago (less than 10k miles), also new oil separator (probably nothing to do with this), among many other things, so I would hope it is not related to these?

other searches have suggested maybe spark plugs, or cam position sensor?

anyone care to throw any more suggestions? the car is actually going in to the indy in the morning, having all new coolant pipes fitted... and I have asked for the coil packs to be inspected / replaced, but I am not so sure now they are at fault....
 
  
View user's profile Send private message
   
michaelbbwalker
Trainee


Joined: 23 Nov 2016
Posts: 84
Location: Cardiff

2005 Porsche 997 Carrera 2S

PostPosted: Wed Jan 23, 2019 1:16 pm    Post subject: Reply with quote

car has gone in this morning... and it cut out on the way there! which has never happened before... hope its nothing too bad....
 
  
View user's profile Send private message
   
toffeeman
Monza


Joined: 05 Mar 2009
Posts: 190



PostPosted: Wed Jan 23, 2019 1:57 pm    Post subject: Reply with quote

Fingers crossed it’s not too expensive but the “grinding” part of your thread above doesn’t sound good. 😬

Keep us informed on this as I always find these type of threads very informative. Good luck.
 
  
View user's profile Send private message
   
wasz
Sepang


Joined: 28 Dec 2012
Posts: 2958


1999 Porsche 996 Carrera 2

PostPosted: Wed Jan 23, 2019 2:00 pm    Post subject: Reply with quote

First thing to do is hook it up to the computer and read the fault codes which I'm sure your indie has done.
_________________
My special order MY99 Vesuvious Charcoal 996 | Clutch, Fly RMS IMS AOS Job |
Steering Rack Hard Lines | Air Con Compressor / System
 
  
View user's profile Send private message
   
jonno_
Nürburgring


Joined: 29 May 2014
Posts: 409
Location: Oxfordshire

2005 Porsche 997 Carrera 2S

PostPosted: Thu Jan 24, 2019 6:00 pm    Post subject: Reply with quote

Coil packs do seem to fail when it's cold and wet, (maybe observation bias though) but 3 years is on the short side for life I'd say.

Spark plugs - 4year change on those too.

Grinding - if only on starting hopefully!) Sounds like starter not disengaging.

Did your indy come back with codes / suggestions yet?
_________________
997.1 Seal Grey c2s manual, ltt, mobridge, zunsports, Carrera S IIs (summer)
 
  
View user's profile Send private message
   
michaelbbwalker
Trainee


Joined: 23 Nov 2016
Posts: 84
Location: Cardiff

2005 Porsche 997 Carrera 2S

PostPosted: Sat Jan 26, 2019 3:05 pm    Post subject: Reply with quote

sorry I never got any emails to tell me there were replies - I assumed no one cared Very Happy

anyway update - the only fault reported was … drum roll...

crank position sensor !

when you look up the symptoms of a bad sensor it sounds like everything that I had - poor hot starts, bad running / misfiring etc.
my coil packs were OK so they can wait til another day.
also had a seized fan on the side of the engine? or something? which is being replaced - a bloody expensive fan by the sound of it!

the car is still in the workshop, apparently my hoses were decayed and crumbling so i'm looking forward to peace of mind that my hoses aren't going to blow up after every journey... and also my car should be driving better now, it has felt a bit flat as of late!

will report back on Monday if I get it back, after a painful bill...
 
  
View user's profile Send private message
   
infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8329
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sat Jan 26, 2019 8:29 pm    Post subject: Reply with quote

michaelbbwalker wrote:
sorry I never got any emails to tell me there were replies - I assumed no one cared Very Happy

anyway update - the only fault reported was … drum roll...

crank position sensor !

when you look up the symptoms of a bad sensor it sounds like everything that I had - poor hot starts, bad running / misfiring etc.
my coil packs were OK so they can wait til another day.
also had a seized fan on the side of the engine? or something? which is being replaced - a bloody expensive fan by the sound of it!

the car is still in the workshop, apparently my hoses were decayed and crumbling so i'm looking forward to peace of mind that my hoses aren't going to blow up after every journey... and also my car should be driving better now, it has felt a bit flat as of late!

will report back on Monday if I get it back, after a painful bill...


After reading your original symptoms I was thinking crank sensor, at least it's sorted now.
_________________
http://euroroadtripper.blogspot.co.uk/

 
  
View user's profile Send private message Visit poster's website
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum