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Lack of power at low revs.
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3
Lack of power at low revs.

I have just bought a D3 Commercial and towed a trailer (about 1500Kg) with it for the first time today.

It doesn't seem to have a lot of torque below 2000 RPM but once over that it is fine. Is this fairly normal? I haven't driven one for over 10 years. By way of comparison, my Fiat Ducato van has much more torque from about 1400 RPM. Both are manual.

Tomorrow I will be towing 3500Kg, so will see how that goes.

I will try and get a code reader on it, to see if there are any faults logged. Perhaps the turbo is getting a bit tired.
  
Post #219496419th Dec 2020 11:15 pm
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KevinD3
 


Member Since: 05 Aug 2020
Location: Sutton Coldfield
Posts: 1188

England 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Could be anything until you get the codes read. Any lights on the dash, today or previously? Any issues pulling off? Had similar symptoms with egrs on their way out, have you got them blanked or are they still live?
 2008 HSE Stornoway Grey

My Wife thinks the D3 is a hobby, The D3 thinks the wife is 💕 
 
Post #219497019th Dec 2020 11:45 pm
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3

No lights on the dash. The EGRs have already been blanked. Will check the codes and report back.
  
Post #219497319th Dec 2020 11:51 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

It could be the turbo actuator sticking
  
Post #219499220th Dec 2020 8:15 am
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3

Our old TD5 used to do that but the wastegate would stick shut then it would over-boost and cut the power at about 2700 RPM.
  
Post #219499320th Dec 2020 8:29 am
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3

Well, the lack of power was really quite noticeable towing 3500Kg this morning, in fact on a slight incline it was struggling to pull away. Driving it this afternoon with no trailer on, it didn't feel too bad, in fact it felt better on the return journey, so it's almost as though the power is a bit variable.

I am only getting this fault code on the engine.



Having read up on the code, it looks like it could point towards the condition of the turbo/sticking wasstegate.
  
Post #219511320th Dec 2020 5:23 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Stuck actuator rod on the turbo, a coat hanger and a long spout oil can will sort it. Remove the NSF wheel and then the heat shields to gain access. There's lots written on here to guide you. Thumbs Up
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #219512220th Dec 2020 5:58 pm
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aja4x4
 


Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zambezi SilverDiscovery 3

I would also clean your manifold pressure sensor.
  
Post #219512520th Dec 2020 6:19 pm
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3

Thanks chaps. I will check the actuator and clean the MAP sensor over the Christmas break. What's it best to lubricate the rod with? Someone mentioned a spray copper grease with a 1200 degrees centigrade melting point.
  
Post #219521321st Dec 2020 12:05 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

I use a mixture of either copper or ceramic grease mixed with engine oil to form a wet paste. An artists brush is ideal to work it into the ball and cup rod connectors.

Spray oil is not a long term solution as it will evaporate really fast once the engine gets hot, though it can be useful for getting the rod moving in the first instance. Thumbs Up
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #219521521st Dec 2020 12:32 am
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GDM
 


Member Since: 18 Oct 2020
Location: Midhurst, West Sussex
Posts: 144

United Kingdom 2007 Discovery 3 TDV6 Commercial XS Manual Zambezi SilverDiscovery 3

Well, I checked the actuator today and, unfortunately, it didn't seem to be particularly seized up. The MAP sensor, however, was pretty carboned up, so I gave that a good clean. I ran out of time to take the car for a run, so will do that tomorrow.
  
Post #219668227th Dec 2020 10:17 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

That might well have sorted it Thumbs Up
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #219668527th Dec 2020 10:22 pm
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Kviasen
 


Member Since: 24 Dec 2020
Location: Norway
Posts: 107

Norway 

P023D is a fault set due to that the map sensor every time the car is started calibrates against the atmospheric pressure in the area.
This is to give the car ecu its best first hand knowledge of the situation and give as correct as possible mixture of diesel and air.
If the sensor is outside some triggerpoints fks it would sence that it is 5 meteres below sea level or on top of Mount Everest the fault code is set because it is an implausible signal.
Normaly the best is to replace sensor since it will be weakened by mechanical or chemical cleaning.
  
Post #219669527th Dec 2020 11:24 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4570

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Nonsense, they are robust sensors and stand up very well to careful chemical based cleaning, provided nothing is is pushed into it puncturing the diaphragm.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #219670327th Dec 2020 11:56 pm
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Kviasen
 


Member Since: 24 Dec 2020
Location: Norway
Posts: 107

Norway 

Its of course ok to have an opinion.
  
Post #219670428th Dec 2020 12:01 am
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