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Restricted power
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4
Restricted power

Hi, I'm hoping someone may just be able to give me a few ideas on this issue, I picked my disco4 up this afternoon after having the cambelt changed and went straight to France - not the best idea in hindsight but on the way up a steep hill I put my foot down and it went into restricted power mode. I pulled over and turned it off and it was fine for another hour until I overtook and again it came on. I've just arrived and managed to lock my keys in it which is weird as it usually beeps if they are left inside, luckily we had a spare set in my wife's bag. Oh and I hit a deer, not really the most enjoyable trip tonight. I'm thinking maybe something has been left unplugged or loose etc and was hoping someone who knows what's involved in doing the cambelt may be able to give me a suggestion as to what to look at, it seems to be ok if you drive really gently and keep it below 2000rpm. There is a Land Rover dealer about an hour away from me but I was hoping it might be something simple.

any help greatly appreciated
Brian
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184195729th Jul 2017 12:20 am
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Disco4Ben
 


Member Since: 22 Mar 2017
Location: Carlisle, Cumbria
Posts: 55

United Kingdom 2013 Discovery 4 3.0 SDV6 XS Auto Indus SilverDiscovery 4

Hi Brian,

The first thing I would check would be the connections for the MAF sensors. If your not mechanically minded, these are the two sensors that attach to the pipes that come from the air box to the left hand side of your engine bay behind the headlight. I believe that the second turbo only kicks in after a certain rpm and so the second MAF may flag up a fault at this point.

Are you towing a caravan?

Ben
  
Post #184197229th Jul 2017 6:05 am
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Barn1e
D3 Decade 


Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021

United Kingdom 2005 Discovery 3 TDV6 S Auto Tonga GreenDiscovery 3

And check that you have fuse 17 in place and it's not blown. I am assuming that D3 and D4 have same wiring for that sensor.
 2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.  
Post #184198929th Jul 2017 7:42 am
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Hi, thanks I'll try these things now, no I'm not towing a caravan, it's reasonably well loaded but only the usual holiday stuff. Thanks for the suggestions
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184199329th Jul 2017 8:16 am
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Hi, I've unplugged and plugged back in the maf sensors and checked the fuse but all seem ok, I've got a really basic fault code reader which hasn't got any codes stored on it. I've just pulled off my drive and within a couple of seconds it's come up with restricted performance again. If anyone can think of anything else to try let me know! Thanks for all the help!
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184200029th Jul 2017 9:07 am
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BrettKaz
 


Member Since: 11 Nov 2013
Location: Canberra
Posts: 209

Australia 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Restricted performance under load on a D3 would normally point to under boost. Just check all your turbo hoses are tightened up. Particularly the ones they might have touched by changing belts.
  
Post #184201329th Jul 2017 9:37 am
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Hi yes that's exactly what happened on my old d3, sudden loss of power and the top pipe had come off at one end, unfortunately I'm not very technical, I've looked at the pipes on top of the engine, are there others lower down I should look at, I can't even see the turbos - on my little turbo Elan I had exactly the same problem with the pipe popping off, on that the turbo couldn't be missed as it's right at the front. Any pointers on where to look for the pipes would be really handy. Thanks for the help!
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184202529th Jul 2017 10:50 am
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ds23man
 


Member Since: 19 Jan 2013
Location: Ainum
Posts: 227

Netherlands 2007 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

The turbo hose going to the inlet of the engine can be split at the underside at the bend. You can only see this when you disconnect it. Had this before.
  
Post #184202929th Jul 2017 11:11 am
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Hi is that the pipe from the air box to the egr valve block - sorry I'm not great at this
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184203029th Jul 2017 11:15 am
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BrettKaz
 


Member Since: 11 Nov 2013
Location: Canberra
Posts: 209

Australia 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

The turbos are at the rear/bottom of the engine and create air pressure to the top of the engine to enter the cylinder with the fuel. They route via an Intercooler / radiator at the front - they should be the thickest hoses going into the front radiator area and exiting towards the top on the engine. I am not familiar with how this exactly routes on the D4. Check your hose clamps and check for splits in the hoses. After that I think you need to get the codes read since that's the only visual style check you can do with your fault.
  
Post #184213829th Jul 2017 6:56 pm
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

That's great thanks I will have a proper look in the morning
Brian
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184214229th Jul 2017 7:11 pm
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BrettKaz
 


Member Since: 11 Nov 2013
Location: Canberra
Posts: 209

Australia 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

The turbos are at the rear/bottom of the engine and create air pressure to the top of the engine to enter the cylinder with the fuel. They route via an Intercooler / radiator at the front - they should be the thickest hoses going into the front radiator area and exiting towards the top on the engine. I am not familiar with how this exactly routes on the D4. Check your hose clamps and check for splits in the hoses. After that I think you need to get the codes read since that's the only visual style check you can do with your fault.
  
Post #184214429th Jul 2017 7:19 pm
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BrettKaz
 


Member Since: 11 Nov 2013
Location: Canberra
Posts: 209

Australia 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

To have a proper look you need to remove 2x inspection panels at the front (bottom) very inside of each of the front inner mud shields. They are 30x30cms and have a right angle bend in them. They are retained by 4x 2 piece clips. You need to removed the inner part of the clip first with a flat screw driver then the outer piece with same. It's a good little job to start the process of becoming a home mechanic which is a prerequisite of ownership of one of these beasts.
  
Post #184214929th Jul 2017 7:49 pm
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brianabbot
 


Member Since: 06 Feb 2010
Location: Rye
Posts: 85

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Thanks for the advice I'll take a look in the morning, fingers crossed...
 D4 HSE
Discovery sport hse black edition
Lotus Elan 
 
Post #184215429th Jul 2017 8:15 pm
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gvw
 


Member Since: 16 Jan 2012
Location: South Yorkshire
Posts: 872

England 2009 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

I had restricted performance which was correctly diagnosed by Flack Bow down
Might be worth a check?
http://www.disco3.co.uk/forum/post1820197.html#1820197
  
Post #184218029th Jul 2017 9:56 pm
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