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fuel pressure
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4
fuel pressure

As I occasionally get limp mode with P0087 and sometimes P2290 I started to measure the fuel pressure at the valve.

readinga are car at a standstill:
Ignition key on 1,5 psi
Idle 3,5 - 4,0 psi
Revving 1.0 psi

Steady needle!

Is this normal?

Have not yet measured the Amps.
  
Post #16631664th Jun 2016 12:10 pm
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anglefire
 


Member Since: 09 Mar 2010
Location: In the Club House
Posts: 4180

England 

Sounds normal to me, but no expert.

My p2290 fault was hp pump.
 Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

_________________________________________________
Disco Picture Website Here 
 
Post #16631774th Jun 2016 12:44 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

But why does the limpmode and error codes just come now and then. limpmode goes away when restarting. Comes usually completely unexpected when cruising.
  
Post #16632194th Jun 2016 2:42 pm
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

The LP does look tired at those figures although not the worst I have seen - some go negative when revved!

The difference between key on and running gets my attention. Unless your battery is weak the big difference in output could be due to wiring / high resistance.
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

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Post #16632244th Jun 2016 2:49 pm
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hgrimmett
 


Member Since: 11 Oct 2009
Location: Bledlow
Posts: 901

2015 Discovery 4 3.0 SDV6 SE Tech Auto Indus SilverDiscovery 4

My recent situation sounds identical to yours. The car would hold 40 mph on the motorway but a hill or any faster and it would throw the p087 or 2290 codes which would resolve on a restart. I suspected the LPFP and based on Robbie's guide I checked the current at the fuse and psi at the valve both of which were the same as yours. I bit the bullet and changed the LPFP and now, 2 weeks later, the issue has not reoccurred by which I assume that I replaced the right part!
 -------------------------------------------------------------------
D4 '15 (64) Se Tech Indus Silver
Tesla Model Y LR (22)
Audi TT Roadster 225 (52)
Tesla Model 3 LR (70) (gone)
Porsche Boxster '96 2.5 5spd project (P)
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BMW 330e eDrive MSport '16 (gone)
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Post #16634154th Jun 2016 9:30 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

So it looks like I should change the LPFP.

A question.

Should I buy the expensive LR complete pump or just buy a motor and keep everything else.
It looks a little tricky to dismantle the unit. Three screwdrivers!

Robbie, what would you suggest.
There seems to be different opinions about just buying a pump.
Is there a recommended pump? And where to buy it?

Filter changed not long ago.
  
Post #16634254th Jun 2016 9:48 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

What sort of gauge are you using to read down to 1psi?
  
Post #16634525th Jun 2016 12:21 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

urhunden wrote:
Robbie, what would you suggest.
There seems to be different opinions about just buying a pump.


Whilst I am a big fan of saving money wherever possible, for a LPFP I'd buy a complete pump.

Please check the voltage at the old pump before sticking in the new one, just in case it is a wiring issue.

Thumbs Up
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #16634605th Jun 2016 6:30 am
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hgrimmett
 


Member Since: 11 Oct 2009
Location: Bledlow
Posts: 901

2015 Discovery 4 3.0 SDV6 SE Tech Auto Indus SilverDiscovery 4

I know my name's not Robbie but... I bought a Peugeot unit with a view to just replacing the pump, then when I realised the job that was in front of me I just went ahead and bought the LR unit - the last thing I wanted to do was get the tank out, remove the module, fiddle about replacing just the motor, put it all back together and not have got it all absolutely right. Just replacing the module gave me peace of mind. Also I read Disco Mikey and others saying that the Peugeot pump motor hadn't lasted very long in some cases.
 -------------------------------------------------------------------
D4 '15 (64) Se Tech Indus Silver
Tesla Model Y LR (22)
Audi TT Roadster 225 (52)
Tesla Model 3 LR (70) (gone)
Porsche Boxster '96 2.5 5spd project (P)
Mini R52 S (54)
BMW 330e eDrive MSport '16 (gone)
D3 '07 (56) XS TDV6 Buckingham Blue (gone) 
 
Post #16637205th Jun 2016 9:24 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

Thank you for the advice.
Will start measuring Volts and Amps before doing anything.
  
Post #16638276th Jun 2016 10:42 am
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

meter

  
Post #16642337th Jun 2016 10:59 am
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AN
 


Member Since: 26 Jul 2005
Location: Hungary
Posts: 327

Hungary 2005 Discovery 3 TDV6 S Auto Java BlackDiscovery 3

Hi,

Any news on the Amps? Have you replaced the LPFP yet? Did it solve the P2290?

I am getting on long journey sometimes P2290.

Thanks,
 LR D3 S Black, Auto TDV6  
Post #167025520th Jun 2016 4:27 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

Have to do the Amp reading when I am in my countryhouse. Hopefully around July 1st.
Not changed anything yet.

Will start a new thread asking a general qusestion. Do not understand how intermittent faults can point to a faulty pump or compressor. I thought motors are either on or of.
  
Post #167038820th Jun 2016 8:12 pm
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hgrimmett
 


Member Since: 11 Oct 2009
Location: Bledlow
Posts: 901

2015 Discovery 4 3.0 SDV6 SE Tech Auto Indus SilverDiscovery 4

Before I replaced my LPFP I noticed that the fault would only occur when the tank was quite empty - i didn't occur when the tank was full. The fault would occur as soon as the pump was under pressure - hills, hard accelerations, high speed etc. It worked OK in normal circumstances then as soon as you demanded more of it it threw a fault.

The motor is likely failing but it only dips below the performance threshold sufficiently to tripa fault ina specific set of circumstances. Or that's how I reconciled it!
 -------------------------------------------------------------------
D4 '15 (64) Se Tech Indus Silver
Tesla Model Y LR (22)
Audi TT Roadster 225 (52)
Tesla Model 3 LR (70) (gone)
Porsche Boxster '96 2.5 5spd project (P)
Mini R52 S (54)
BMW 330e eDrive MSport '16 (gone)
D3 '07 (56) XS TDV6 Buckingham Blue (gone) 
 
Post #167039020th Jun 2016 8:16 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

My fault and code comes very intermittent. Usually when cruising with just little gas. Have tried to find if it comes when the tank is full or empty. Cannot find any difference.
  
Post #167039420th Jun 2016 8:21 pm
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