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Engine 'hunting' on light throttle
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patersp
 


Member Since: 09 Jun 2016
Location: Bromley
Posts: 91

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4
Engine 'hunting' on light throttle

Morning all. Bit of a difficult one to describe but, on light throttle, it's as if the engine is hunting until speed/revs are increased.

It happens when slowing down for a roundabout or slowing down when turning into a junction. It's not the good old hesitation that we all seem to experience - this is different. Almost like the engine isn't receiving sufficient fuel until the revs are picked up. If I'm a bit more aggressive on the throttle it doesn't happen, but then you get a jerk as it kicks down and I prefer to be a smooth driver 8)

Has anybody experienced this before?

As always, thanking you in anticipation.
  
Post #199058710th Oct 2018 9:51 am
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Browny90
 


Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 686

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Fuel Filter?

Or has it been serviced recently?

Do you always fill up at the same place? could it be contaminated/ crap fuel?
 Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt. 
 
Post #199058810th Oct 2018 9:56 am
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patersp
 


Member Since: 09 Jun 2016
Location: Bromley
Posts: 91

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Cheers for the advice. It did have a service at a very good indy garage in July but it didn't include a fuel filter change this time round.

I normally use V-Power diesel from Shell but the SWMBO tends to run the tank low until the warning light comes on (and beyond) so maybe there is some crud in the filter....
  
Post #199059010th Oct 2018 10:09 am
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Browny90
 


Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 686

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

I would start with changing the fuel filter..
maybe run your tank low, fill up with decent fuel, then change the filter..

To be honest, I always run my tank down to super low and have never had a problem with 'crud in the bottom of the tank'.

if you change the filter, fresh fuel, a really good blast on the motorway, then go from there..

Thumbs Up
 Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt. 
 
Post #199059310th Oct 2018 10:16 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

New oem filter won’t do any harm if it hasn’t already had one recently, have the injector live values checked at tick over, highly likely you have a faulty injector or two Big Cry
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #199059610th Oct 2018 10:18 am
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patersp
 


Member Since: 09 Jun 2016
Location: Bromley
Posts: 91

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Now that sounds expensive........ Rolling Eyes

Would this flag as a fault code as the car had the symptoms before the service and the indy said there were no errors present?
  
Post #199063610th Oct 2018 11:56 am
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patersp
 


Member Since: 09 Jun 2016
Location: Bromley
Posts: 91

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Had a bit of a play tonight and it doesn’t do it from standing still, only when in a higher gear and the revs are low, almost like it’s not in the correct gear. Odd behaviour. Got to love them Razz
  
Post #199078610th Oct 2018 7:20 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8041

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

Can’t tell what gear mine is in, when revs are low it changes down automatically I think, it’s so smooth I just don’t feel anything, it sounds more like a gb problem to me, maybe resetting the gb adaptations might help.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #199082910th Oct 2018 8:24 pm
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patersp
 


Member Since: 09 Jun 2016
Location: Bromley
Posts: 91

United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Think it may be worth a visit to my local indy Very Happy
  
Post #199084110th Oct 2018 9:13 pm
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