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- 0
991 : 2011- 24
997 : 2004- 66
996 : 1997-2005 34
993 : 1993-1998 4
964 : 1989-1993 1
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 2
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 30
Cayman : 2005- 20
Cayenne : 2003- 7
Macan : 2014- 6
Panamera : 2009- 0
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
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 8:19 am    Post subject: New to me 1998 C2 with Possible Variocam Solenoid issue. Reply with quote

Hi all,

I have just taken ownership of a 1998 996.1 C2 with 85k on the clock (picks to follow once cleaned and a sunny day), and its thrown a Flashing then solid CEL. downloaded the codes and it turns out to be miss fires et total on bank 2. I know the coils and spark plugs were done 2000 miles ago (albeit 3 years back) as I did them for a friend (who I subsequently bought the car from).

My question having come to the conclusion it is likely the variocam solenoid giving the issue. DO I need to lock the cams to pull the solenoid as it looks simple enough to just pull it, give it a clean and functional test then refit or replace if bad.

cheers

Al
 
  
View user's profile Send private message
   
Martin996RSR
Nürburgring


Joined: 08 Dec 2016
Posts: 422



PostPosted: Fri Oct 25, 2019 10:43 am    Post subject: Reply with quote

Someone will be along sooner or later with a link to the procedure on how to do it, but it's not quite as simple as it looks. Yes, you need to lock the cams, but you also need to remove the cam cover on the affected side as the soilenoid cover that you can see is just that; a cover, not the solenoid itself, and removing it doesn't give access to remove the solenoid.

Once the cam cover is off, I gather it's reasonably straightforward if you're careful and methodical. It can be done with the engine in the car, but the exhaust manifold will need to be removed to give you room to work, as well as the engine needs to be dropped down a couple of inches on a jack to imrove access.
 
  
View user's profile Send private message
   
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 10:49 am    Post subject: Reply with quote

Martin996RSR wrote:
Someone will be along sooner or later with a link to the procedure on how to do it, but it's not quite as simple as it looks. Yes, you need to lock the cams, but you also need to remove the cam cover on the affected side as the soilenoid cover that you can see is just that; a cover, not the solenoid itself, and removing it doesn't give access to remove the solenoid.

Once the cam cover is off, I gather it's reasonably straightforward if you're careful and methodical. It can be done with the engine in the car, but the exhaust manifold will need to be removed to give you room to work, as well as the engine needs to be dropped down a couple of inches on a jack to imrove access.


cool, might be a good excuse for stainless manifolds then. silver linings and such.
 
  
View user's profile Send private message
   
Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17140
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Oct 25, 2019 10:53 am    Post subject: Reply with quote

Variocam solenoid has nothing to do with ignition timing so the CEL isn't on for that.
_________________
2000 Manual 996 C4 Arctic Silver Convertible


 
  
View user's profile Send private message
   
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 10:59 am    Post subject: Reply with quote

Alex wrote:
Variocam solenoid has nothing to do with ignition timing so the CEL isn't on for that.


what do you suggest? as i'd like pulling the cam cover to be my last resort
 
  
View user's profile Send private message
   
Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17140
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Oct 25, 2019 11:02 am    Post subject: Reply with quote

You could try swapping plugs and coil packs with the otherside, but for all 3 to show as a misfire I'd think it may be something else. Dont know
_________________
2000 Manual 996 C4 Arctic Silver Convertible


 
  
View user's profile Send private message
   
Martin996RSR
Nürburgring


Joined: 08 Dec 2016
Posts: 422



PostPosted: Fri Oct 25, 2019 11:06 am    Post subject: Reply with quote

If the variocam solenoid is causing the misfire then you can verify it by having a specialist plug it into a diagnostic computer and activate the solenoids independently. If the idle note changes for one bank but not the other then you've confirmed the fault.

I have long suspected I have a duff solenoid on my bank 2, and recently did just this to verify it. Another indicator (though not conclusive) is whether you have a loping/pulsing exhaust on the opposite side from where the duff bank is.

The thing is, a misfire confined to just one bank has a limited number of causes. If you're sure the plugs and coils are good, and this is confirmed by the engine running normally at normal driving speeds, then you're into the cam timining, which can only be a worn chain guide, duff tensioner, or duff solenoid. There just isn't all that much stuff that's confined to all the cylinders on one side.
 
  
View user's profile Send private message
   
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 11:06 am    Post subject: Reply with quote

was thinking of doing this if the weather holds out tomorrow/Sunday and also give the maf a clean as i have heard they can cause all sorts of weird and wonderful snags.
 
  
View user's profile Send private message
   
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 11:09 am    Post subject: Reply with quote

Martin996RSR wrote:
If the variocam solenoid is causing the misfire then you can verify it by having a specialist plug it into a diagnostic computer and activate the solenoids independently. If the idle note changes for one bank but not the other then you've confirmed the fault.

I have long suspected I have a duff solenoid on my bank 2, and recently did just this to verify it. Another indicator (though not conclusive) is whether you have a loping/pulsing exhaust on the opposite side from where the duff bank is.

The thing is, a misfire confined to just one bank has a limited number of causes. If you're sure the plugs and coils are good, and this is confirmed by the engine running normally at normal driving speeds, then you're into the cam timining, which can only be a worn chain guide, duff tensioner, or duff solenoid. There just isn't all that much stuff that's confined to all the cylinders on one side.


Not listened to the exhausts to be fair. Will have to find my local specialist and get it plugged in. It drives ok but idles like crap.
 
  
View user's profile Send private message
   
Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 17140
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Fri Oct 25, 2019 11:13 am    Post subject: Reply with quote

My duff solenoid never put the CEL on.
_________________
2000 Manual 996 C4 Arctic Silver Convertible


 
  
View user's profile Send private message
   
Fatal8446
Newbie


Joined: 14 Jan 2016
Posts: 12



PostPosted: Fri Oct 25, 2019 2:31 pm    Post subject: Reply with quote

So unplugged the MAF and cleared the codes, would you adam and eve it. the failt is cleared and it idles like a dream. now need some torx bits with a hole in the middle........ damn you porsche ...... making me buy more tools
 
  
View user's profile Send private message
   
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