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
Porsche Buyers Guides
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Model
Stock
Porsche 911
991 : 2011- 9
997 : 2004- 67
996 : 1997-2005 41
993 : 1993-1998 11
964 : 1989-1993 5
Carrera 3.2 : 1983-1989 1
Carrera SC : 1977-1983 0
930 Turbo : 1975-1989 0
Early 911 : 1964-1977 2
Porsche Other Models
Classic : 1950-1965 1
Boxster : 1997- 14
Cayman : 2005- 12
Cayenne : 2003- 9
Macan : 2014- 2
Panamera : 2009- 3
912-914-924-928-944-968 4
959 - CarreraGT - RaceCar 1
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 & Body 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 [991] 2011-Current
Porsche 911 [991]
911 [997] 2004-Current
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
Robertb
Zolder


Joined: 01 Sep 2003
Posts: 5997
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Mon Jan 09, 2017 10:44 am    Post subject: New plugs... any difference? Reply with quote

I've treated my daily, an 04 3.0 petrol X5 to an inspection 2 service, inc new filters and spark plugs.

Feels quite different... more power.

Is it a placebo effect, or can new plugs and bits make a difference?

I've always imagined that as long as a plug was sparking OK, then a spark was a spark on the basis all it had to do was ignite the fuel mix.
_________________
"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
View user's profile Send private message Send e-mail
   
Porsche News
Motoring Editor
Motoring Editor


Joined: 08 Feb 2008
Posts: 6917



PostPosted: Mon Jan 09, 2017 5:52 pm    Post subject: Reply with quote

Quote:
1. Engine has a rough idle

Your engine idles when it is a stationary and in this position the engine normally produces around 1000rpm. The sound the engine gives off is constant and smooth but if your spark plugs aren’t performing as they should, your engine will produce a rough and jittery sound while producing larger vibrations through the car. Not having this checked can lead to costly damage being done.

2. Having trouble starting your car?

Many people put their car not starting down to being out of fuel or having a flat battery. One possibility you may overlook is having bad or worn spark plugs. If your spark plugs don’t produce the spark needed to get the vehicle moving, then you’re going nowhere. It is also possible that faulty spark plugs are causing your battery to drain. If so you need to have your battery and spark plugs changed as soon as possible.

3. Your engine misfires

When your engine misfires it causes the vehicle to halt for a fraction of a second and then continues it’s usual movement. This means the vehicle isn’t functioning as smoothly as it should because one or more cylinders aren’t firing properly, which can also lead to higher amounts of emissions.

4. Engine surging

When a vehicle sucks in more air than usual in the combustion process it can cause the vehicle to jerk and then slow down or continually start and stop, which means the vehicles engine is working inefficiently. This is also known as engine hesitation and dangerous situation can arise if this occurs in traffic.

5. High fuel consumption

If your spark plugs have deteriorated you’ll notice that your vehicles fuel economy can decrease by up to 30% due to incomplete combustion. If you notice you’re having to fill up more often than usual it can be caused by deteriorating spark plugs. To get back to your vehicle’s optimum level of fuel consumption all you’ll need to do is have your spark plugs changed.

6. Lack of acceleration

If your vehicle is accelerating poorly it is fairly easy to tell. It feels as if the vehicle doesn’t want to respond when you put your foot down, or it does but not instantly as you’ve become accustomed to. It can also feel as if your vehicle is trying really hard to pull itself along. This ‘sluggishness’ can be easily fixed by having the vehicle serviced with a spark plug change.

_________________
>Competitive Porsche Insurance <



Like 911UK ON FACEBOOK
 
  
View user's profile Send private message
   
Robertb
Zolder


Joined: 01 Sep 2003
Posts: 5997
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Mon Jan 09, 2017 7:32 pm    Post subject: Reply with quote

Cheers... seems it could make a marginal difference at best... the new air filter element may also help get more, umm, air in, so it's breathing better too.

I suppose marginal gains added up may contribute something.
_________________
"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
View user's profile Send private message Send e-mail
   
infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 7169
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Tue Jan 10, 2017 2:47 pm    Post subject: Reply with quote

New plugs before they are needed at service time can make a noticeable difference. I had one break down at 10k miles and needed to be replaced, the rest were fine but I replaced them all.
_________________
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 can post calendar events in this forum