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2012 D4 SDV6 Restricted Speed Warning !
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richardch
 


Member Since: 27 Dec 2005
Location: Zurich
Posts: 415

Switzerland 2012 Discovery 4 3.0 SDV6 HSE Auto Chawton WhiteDiscovery 4
2012 D4 SDV6 Restricted Speed Warning !

Bow down Oh No our D4 has been unblindingly reliable for 2 years until now, when we get the infamous restricted speed warning, which comes on uphill under load with red warning light, so I guess we can rule out a blown MAF/Turbo compressor value/Dirty fuel filter and so its down to a split turbo hose or the unmentionable inlet manifold as its a pressure issue ??? my garage is on holiday until Jan 6th like all the rest & wifey distinctly unhappy Big Cry and I havent even talked to the dog about it yet
  
Post #210939430th Dec 2019 6:05 pm
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Moo
D3 Decade 


Member Since: 13 Aug 2010
Location: Wiltshire
Posts: 13806

Ukraine 2005 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

Inlet manifold Whistle
 New Defender L663 110 SE (known as Noddy!)

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No longer the Old Buses original owner Sad
231,000 miles and counting
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Post #210939930th Dec 2019 6:18 pm
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richardch
 


Member Since: 27 Dec 2005
Location: Zurich
Posts: 415

Switzerland 2012 Discovery 4 3.0 SDV6 HSE Auto Chawton WhiteDiscovery 4

ok took the engine cover off and got the spot light out, no signs of any obvious leakage from either side, also cleaned and swapped the MAFs to to no avail but normally when a MAF is blown the car runs rough anyway and ours doesnt.

my deep concern is that even if it is the inlet manifold, if one side goes surely its inevitable the other will too and I dont want to be in the middle of France when that happens but I guess there are little economies of scale from getting both done at once ?

restricted speed light comes on almost immediately now but cant hear any whistling
  
Post #21098131st Jan 2020 2:00 pm
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DrRobH
 


Member Since: 10 Oct 2015
Location: Hampshire
Posts: 924

United Kingdom 

Perhaps get a smoke test done on it....
 Visitor from fullfatrr.com
RR Vogue SE 2011 4.4 TDV8
1974 Lightweight 
 
Post #21098151st Jan 2020 2:06 pm
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mike23118
 


Member Since: 01 Oct 2010
Location: North Wales
Posts: 1028

Wales 2014 Discovery 4 3.0 SDV6 HSE Auto Loire BlueDiscovery 4

split intercooler / pipe
If it is,get your head close to the ground at the front n/s ish while someone rev's it (make sure its in neutral )and you should be able to hear sound of an air leak
  
Post #21098231st Jan 2020 3:11 pm
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richardch
 


Member Since: 27 Dec 2005
Location: Zurich
Posts: 415

Switzerland 2012 Discovery 4 3.0 SDV6 HSE Auto Chawton WhiteDiscovery 4

and the winner is indeed MIKE !! thks mate split intercooler hose LR 076845
  
Post #21100482nd Jan 2020 11:17 am
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mike23118
 


Member Since: 01 Oct 2010
Location: North Wales
Posts: 1028

Wales 2014 Discovery 4 3.0 SDV6 HSE Auto Loire BlueDiscovery 4

Glad to help Thumbs Up
  
Post #21101422nd Jan 2020 4:49 pm
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raincloud
 


Member Since: 16 Aug 2011
Location: nottinghamshire
Posts: 136

England 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

richardch wrote:
and the winner is indeed MIKE !! thks mate split intercooler hose LR 076845


Bonus as that is probably the least expensive outcome given the symptoms
  
Post #21101452nd Jan 2020 5:03 pm
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richardch
 


Member Since: 27 Dec 2005
Location: Zurich
Posts: 415

Switzerland 2012 Discovery 4 3.0 SDV6 HSE Auto Chawton WhiteDiscovery 4

Guys I am so frigging happy !, back on the road again, I bought the part from Maltings at Gainsborough who were VERY helpful (I was the once a graduate trainee production manager at the then Spillers Gainsborough flour mill), cleaning & swapping the MAFs seems to have helped as goes like a train now
  
Post #21103703rd Jan 2020 4:00 pm
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ianm27
 


Member Since: 02 Jun 2016
Location: Hertfordshire
Posts: 2154

England 2012 Discovery 4 3.0 SDV6 GS Auto Orkney GreyDiscovery 4

Glad your car is back on the road again Thumbs Up and presuming SWMBO and dog are happy again Smile
 Uncle Ray's spare wheel protector
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Post #21103713rd Jan 2020 4:05 pm
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LT
 


Member Since: 31 Dec 2005
Location: South West
Posts: 23262

United Kingdom 2016 Discovery 4 3.0 TDV6 Landmark LE Auto Santorini BlackDiscovery 4

Result! Thumbs Up
 2006 D3 HSE (Original & still the best)-GONE
2010 D4 HSE (A bit bling)-GONE
2014 D4 HSE (Almost too bling)-GONE
2015 D4 HSE (A heated what?)-GONE
2016 D4 Landmark (Written Off)-GONE
2016 D4 Landmark (Surely the last!) PD1881 rims-GONE
2017 FFRR SDV8 Autobiography 
 
Post #21103763rd Jan 2020 4:54 pm
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mike23118
 


Member Since: 01 Oct 2010
Location: North Wales
Posts: 1028

Wales 2014 Discovery 4 3.0 SDV6 HSE Auto Loire BlueDiscovery 4

Thumbs Up Thumbs Up
  
Post #21104303rd Jan 2020 7:45 pm
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