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D4 Adaptive idle values and vibration
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Pugrot
 


Member Since: 30 May 2017
Location: Melbourne
Posts: 16

Australia 2012 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4
D4 Adaptive idle values and vibration

Hi folks I have a 2012 discovery 4 3.0 and wondering if it is possible to adjust the idle. Mine appears to be too low I.e. 750rpm when at idle and I am getting vibration coming through steering wheel, seats and occasionally the dash. Happens whether cold or warm or in drive, park or neutral but only when stopped. Have had engine mounts and maf sensor replaced but hasn't helped at all. Mechanic said the rpm is on the low side and should ideally stay around 780-800 but says he can't fix it. This doesn't sound right to me.
Having looked on the forum, it appears I am not the only one with this problem but what is common is that there are more questions than answers to this issue. I am wondering if this problem is as a result of my wife now driving the disco in city stop start traffic and it has picked up some bad behaviour. Previously it did mainly highway driving.

Thoughts, suggestions most welcome before I take it to another mechanic for a second opinion .. Big Cry
  
Post #183810418th Jul 2017 1:44 pm
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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

Have you had fault codes read.
 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 #183811618th Jul 2017 2:33 pm
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Braysh
 


Member Since: 18 Apr 2015
Location: Rillington
Posts: 9

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Ipanema SandDiscovery 4

Mine ticks over at 720rpm, according to my iid..... I noticed a lot of vibration on tick over when I first got it, cured it by changing the orange exhaust rubber mounting.
  
Post #183830618th Jul 2017 9:24 pm
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Pugrot
 


Member Since: 30 May 2017
Location: Melbourne
Posts: 16

Australia 2012 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

No fault codes appearing. Interesting about the orange rubber mount. Will have to get under the vehicle to see if I have the same. Mechanic said he checked the exhaust in case it was touching the chassis but it wasn't.
Was the vibration before you changed the exhaust rubber coming thru steering wheel and passenger seat
  
Post #183835819th Jul 2017 4:57 am
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dgardel
 


Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025

Italy 2014 Discovery 4 3.0 SDV6 XXV LE Auto Santorini BlackDiscovery 4

Pay attention, if you run the car during hot days with the A/C on "Auto" or "ON", the engine idle is higher. try to switch off the A/C.
 Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition

IID Pro MV License

 
 
Post #183837419th Jul 2017 6:32 am
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Pugrot
 


Member Since: 30 May 2017
Location: Melbourne
Posts: 16

Australia 2012 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

It's winter in Australia at the moment but even if I put the aircon on, it makes very little difference ie hardly noticeable in rpm and still feel vibration.
  
Post #183838219th Jul 2017 7:04 am
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Naks
 


Member Since: 12 Jul 2010
Location: Stellenbosch, Republic of the Western Cape
Posts: 756

South Africa 2011 Discovery 4 3.0 SDV6 SE Auto Fuji WhiteDiscovery 4

dirty injectors?

maybe run a tank of injector cleaner and see if that makes a difference?
 --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: http://bit.ly/22l8YHh
Range Rover/Sport L320/L322/L494 Workshop Manual: http://bit.ly/2iH7jgG 
 
Post #183838419th Jul 2017 7:12 am
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dgardel
 


Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025

Italy 2014 Discovery 4 3.0 SDV6 XXV LE Auto Santorini BlackDiscovery 4

Pugrot wrote:
It's winter in Australia ......


Embarassed Oopsss!!!
 Discovery 5 tdv6 HSE Corris Gray Outback Engineering Limited Edition

IID Pro MV License

 
 
Post #183845819th Jul 2017 9:23 am
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Pugrot
 


Member Since: 30 May 2017
Location: Melbourne
Posts: 16

Australia 2012 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

Naks wrote:
dirty injectors?

maybe run a tank of injector cleaner and see if that makes a difference?


Has had professional injector clean and also running diesel additive in fuel. Appreciate the suggestions and keep them coming.
  
Post #183852119th Jul 2017 12:21 pm
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Braysh
 


Member Since: 18 Apr 2015
Location: Rillington
Posts: 9

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Ipanema SandDiscovery 4

No vibration through steering wheel but was very noticeable through the whole of the car on tick over. I still have an issue with vibration from the exhaust but not felt through the car now. Sounds like I've got loose baffles in the centre silencer but when the exhausts is lifted slightly by hand, the noise stops.... but can't see anywhere where the exhaust is touching. I have noticed that the brake lines running to the back of the car aren't clipped back and they do rattle between the floor and heat shields, but that's not gonna cause what your experiencing so I won't bore you with it Embarassed
  
Post #183930721st Jul 2017 1:40 pm
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Pugrot
 


Member Since: 30 May 2017
Location: Melbourne
Posts: 16

Australia 2012 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

I hear your frustration. I guess I will just have to live with it.
  
Post #184957621st Aug 2017 9:48 am
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Bazza.
 


Member Since: 06 Jul 2018
Location: Essex
Posts: 332

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Zambezi SilverDiscovery 4

I have this vibration on tick over (quite loud) so I went under the car for a poke about.

A firm finger on the exhaust box by the compressor and all is well again so I think its the exhaust mounting rubbers as stated in a earlier post.
 Disco 4 2012  
Post #19989218th Nov 2018 8:21 pm
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