Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Restricted performance No codes
Well things go from bad to worse, crazy.
Between my air suspension pump failing, the hand brake module failing, squeaky rear brakes when reversing and now restricted performance when cold.
What else can go wrong.
Well, first drive cold if I go above 2500 revs I get the restricted performance message and no power but strangely no error messages or codes on my IIDTool that relates to this.
If I pull over, clear all errors and start back up the car drives normally and also drives normally when at normal temperature.
Any ideas?
Some screen shots below.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
17th Dec 2022 2:43 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Anyone!
Or is it a cracked manifold?
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
18th Dec 2022 4:25 pm
Moo D3 Decade
Member Since: 13 Aug 2010
Location: UK
Posts: 14417
No error codes is what happened to mine when the second manifold failed.
Best get a smoke test. D4 HSE EU6 (Known as Jeeves)
New Defender L663 110 SE (known as Noddy!) Sold
Sold Volvo XC90 R-Design (known as Basil)
Sold - D4 HSE (Known as Gerty)
No longer the Old Buses original owner
231,000 miles and counting
05 S manual owned from March 2005
D4 Face lifted
Still original injectors and turbo
V8 Front brakes
BAS Remap, Allisport Intercooler and deCat
EGRs blanked
T-Max split charge
Hanibal Expeedition rack
Prospeed ladder
Duratrac tyres
IID BT
BAS FBH control
18th Dec 2022 5:08 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Yes that’s what I thought, might get a smoke machine and test it.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
18th Dec 2022 6:14 pm
Miffed_G
Member Since: 30 Nov 2020
Location: Suffolk
Posts: 22
If you have the IID tool - then certain codes will not show up - unless you setup the app to show current fault codes - i'll see if i can find the setting - but I had the same issue with fault codes not showing in the default view - change a setting to display in progress / unconfirmed faults and bobs your uncle - fault codes came up!
22nd Dec 2022 3:56 pm
Mastertech
Member Since: 13 Apr 2014
Location: North East
Posts: 131
To check your manifolds without smoke testing, check underside of engine cover ( the foam) for black engine oil then remove the foam covers from the injectors and check around the seam of the manifold/ rocker covers for oil, also check the large flat bulge bit for a crack.
I’ve don’t loads of these and I’ve never needed a smoke machine to see the problem.
Also while we are on the subject, what manifolds do people buy? Genuine? Ones from Advanced (doesn’t give a make) or others ( loads of makes on AUTODOC etc.
22nd Dec 2022 6:46 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Thanks for the tips guys most greatfull.
Will have a better look after Christmas off work for 10 days so time on my hands so to speak.
Regards and Merry Christmas all.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
22nd Dec 2022 7:30 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Update…….
Purchased a smoke machine and as per attached video there is no leaks coming from the manifolds but I do have a leak on the front of the engine.
Me not being a mechanic what’s involved in fixing the leak.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
13th Jan 2023 7:26 pm
Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
It looks to me like the 'O' ring on the throttle body is leaking - bad news, LR don't sell it separately but if you take it off and measure it, plenty of other places will be able to sell you one.
It's not difficult, there's an M6 bolt and a spring clip to remove to get to it - easier still if you remove the top fan cowling.
13th Jan 2023 7:50 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Thanks, yes I have a feeling that’s the issue.
When I purchased the car I noticed oil on top of the engine but didn’t do anything about it until now but glad I looked now.
Regarding the restricted performance issue I cleaned the MAF sensors with sensor spray and when I left work today engine cold I booted it and no restricted issues.
I’m hoping the cleaning resolved that issue but would the leak from the throttle body cause the restricted message?
Thanks.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
13th Jan 2023 8:02 pm
Flatlander
Member Since: 20 Jul 2015
Location: Here
Posts: 575
Yes it could - I've seen plenty of those 'O' rings either split due to ageing or damaged due to the spring clip being mis-seated (some from factory), very few set a DTC - mainly I think due to having a VVT that can produce the required boost pressure at the inlet manifold even with a leak. The DTC will only be set when the measured boost pressure is insufficient and the VVT is on it's end-stop. now it's 50/50 whether the problem is with the charge air leak or the boost pressure sensor - or a combination of both - but cleaning the sensor and fixing the leak should prevent any re-occurrence.
ETA - do you mean MAF or MAP?
13th Jan 2023 8:37 pm
Mastertech
Member Since: 13 Apr 2014
Location: North East
Posts: 131
You can see the plastic intake elbow isn’t sitting straight/ not clipped in properly. Loosen the 10mm bolt on the left as you look at it, remove the clip and push the elbow all the way on, fit the clip making sure the locking parts are in the groove on the Y pipe then tighten the 10mm back up. Re perform smoke test and clean oil residue from any rubber parts as it will cause them to swell up. You don’t want to blow a coolant or vac pipe because you left oil on it.
13th Jan 2023 8:56 pm
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Thanks all.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
14th Jan 2023 10:28 am
Realist
Member Since: 21 Mar 2016
Location: South Wales
Posts: 357
Well, removed the throttle body and cleaned it up, checked the seal and replaced making sure it’s seated correctly.
Carried out a smoke test and not a single leak anywhere in fact it created that much pressure the but plug lol 😆 blew out.
So, big relief that the manifolds are not leaking and now it’s sealing correctly and I cleaned the MAS sensors as well plus changed the crappy old dirty air filter.
Took it for a hard drive cold and no restricted performance came up, noticed the car drove a bit better.
Now, I have to sort out the air compressor getting an error message on that so that’s another thread I started and a full service is needed.
Thanks all.
Regards.
Why wait, just go for it and enjoy life.
Previous….
Discovery 300TDI
Range Rover Vogue
2010 Discovery 4 GS Santorini Metallic Black
14th Jan 2023 12:34 pm
ianm27
Member Since: 02 Jun 2016
Location: Hertfordshire
Posts: 2154
Good to hear you got this problem resolved and at relatively cheap cost Uncle Ray's spare wheel protector
Limo Tint
Blackvue front & rear dashcam
Cruise control switch pack
Bodsy's remote for FBH
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