Porsche 911 UK Enthusiasts Online Community Discussion Forum GB
Welcome to the @Porsche911UK website. Register a free account today to become a member! Sign up is quick and easy, then you can view, participate in topics and posts across the site that covers all things Porsche.
Already registered and looking to recovery your account, select 'login in' and then the 'forget your password' option.
Lumpy when cold
- Thread starter acer54
- Start date
i'm afraid that's an absolute needle in a haystack ..
Fouled plug , old plugs poor injector spray pattern ... a coil faulty , secondary air injection fault .. valve timing .. i could go on to be honest ..
I would sit there looking at the engine values on a tester and probably over several mornings to try and figure out what might be causing it .
not something i can give an answer to
Fouled plug , old plugs poor injector spray pattern ... a coil faulty , secondary air injection fault .. valve timing .. i could go on to be honest ..
I would sit there looking at the engine values on a tester and probably over several mornings to try and figure out what might be causing it .
not something i can give an answer to
deMort said:i'm afraid that's an absolute needle in a haystack ..
Fouled plug , old plugs poor injector spray pattern ... a coil faulty , secondary air injection fault .. valve timing .. i could go on to be honest ..
I would sit there looking at the engine values on a tester and probably over several mornings to try and figure out what might be causing it .
not something i can give an answer to
It's not registering any codes either which makes it more difficult to diagnose as well.
All plugs were changed last October and coil packs on cylinders 2,3 and 6 were changed (maybe the unchanged coil packs should be changed)?
MarkGolf said:
I'll have that checked, also it's been pointed out if the idle speed is the same hot or cold and I can confirm that it is, opinion is that it should be elevated during a cold start until engine is up to temperature.
Once engine is up to normal temperature it runs normally.
Yeah, VR6's do that, funnily enough, I spent yesterday adjusting the cold idle on my VR6. In the current temp, it idles at 1050 on the cold map and then drops to just below 800.
I used to have an issue with being lumpy when cold and resolved that over Christmas by replacing the intake manifold gasket.
1 big thing I forgot which effects the VR6, R32, is the PCV, these always break and introduce an air leak.
Provided the plugs/coils aren't old, then the above would be where I'd be looking.
I used to have an issue with being lumpy when cold and resolved that over Christmas by replacing the intake manifold gasket.
1 big thing I forgot which effects the VR6, R32, is the PCV, these always break and introduce an air leak.
Provided the plugs/coils aren't old, then the above would be where I'd be looking.
Similar threads
Latest posts
-
For Sale Oem 997.1 c4s rear silencers for sale
- Latest: red_baron_simon
-
-
-
-
-
-
-
-
New Threads
-
-
-
PCM 1: Does my radio and sat nav from a 2002 996 have any value
- Started by martin t
- Replies: 2
-
1/18 Porsche scale model collections
- Started by Maxie
- Replies: 8
-
997.1 GT3 rear spring part number?- Started by jayessdoubleu
- Replies: 4
-
For Sale Mobilube ptx 75w90- based near Loughborough- £11 a litre
- Started by Bigbaddog997
- Replies: 0
-
Porsche Model Range
Porsche 911
Porsche 992: 2018-
Porsche 991: 2011-2019
Porsche 997: 2004-2012
Porsche 996: 1997-2005
Porsche 993: 1993-1998
Porsche 964: 1989-1993
Porsche Carrera 3.2: 1983-1989
Porsche Carrera SC: 1977-1983
Porsche 930 Turbo: 1975-1989
Porsche Early 911: 1964-1977
Porsche Hypercars
Porsche 918 Spyder
Porsche Carrera GT
Porsche GT1
Porsche 959
Other Current Porsche Model
Porsche Taycan : (2019-0%)
Porsche Macan : 2013-
Porsche Panamera : 2009-
Porsche Cayman: 2005-
Porsche Cayenne: 2003-
Porsche Boxster: 1997-
Porsche Legacy Models
Porsche 928
Porsche 968
Porsche 944
Porsche 924
Porsche 914
Porsche 912
Porsche 904
Porsche 550
Porsche 356 Speedster
Porsche 356
