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Engine System Fault
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

I had a read of the guide, which is fantastic!! and will test out the AMP draw this evening, as I've had the Wife on the phone to say it's gone to limp mode at least 5 times this morning....Looks like whatever it is it's getting worse.


Do you know if the wiring to the LPFP is accessible without dropping the tank? Just want to check that this is also Ok before looking at a new pump Smile

Mike
  
Post #20590336th Jun 2019 12:40 pm
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Ok AMP testing done and I'd say it's going to need a new LPFP - It gave a whopping 3.9A

Now to find somewhere that has one in stock that can delivery Saturday morning Smile
  
Post #20591016th Jun 2019 6:29 pm
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Just an update...

Pump replaced well that was a pain in the backside to do Smile

Took me an hour just to remove one of the rear pipe as the clip was not budging and it was in the most awkward place, you can just about reach it through the rear wheel arch, luckily my arms are not to big Smile

Once the tanks was dropped it was obvious a previous owner had had a nice drive on the beach at some point as the top of the tank was covered in sand, and all around the section that you need to remove to get the pump out, so a good clean as I didn't want any sand getting in the tank. remove pump, refit new pump, then get it all back together.

Started 1st time after a bleed which was done just by running the pump, no need to touch the valve in the engine bay.

And touch wood she has been fine ever since, even towing!!.

Thanks for all the advise and help!!

Now to think about fixing the AC Rolling with laughter

Mike
  
Post #206207518th Jun 2019 2:52 pm
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

ARRRRRRGGHHHHH

Just when you think you have it all fixed - BONG BLOODY BONG!!!!

Slightly different codes this time, a lovely

P2290-00 (2F) Injector Control pressure too low

Is this now likely to be the HPFP?

Big Cry Big Cry
  
Post #206243519th Jun 2019 6:46 pm
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

So after nearly a week or uneventful driving coming back from an event last night and driving on the M25 we get the dreaded bongs, this time i have the IID tool, so plug that in and start monitoring the Fuel Pressure, within 200 metres it bongs again and this is what I say on the graph.


Click image to enlarge


Fuel pressure is normal, then starts to drop off and a big spike as it bongs, then picks up (to a lower level) which is when the foot goes to the floor so we still keep a bit of forward momentum.

Has anyone seen anything like this and is it pointing towards a new HPFP?

On that note a possibly a silly question but is a MY07 a EU3or EU4 and how do you tell?

Mike
  
Post #206329123rd Jun 2019 6:52 am
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Oswiperus
D3 Decade 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

MY7 is euro4.

Euro 4 has the fuel filter just in front of the fuel tank behind a bolt on shield as opposed to euro 3 which has a tall filter with 4 pipes fitted directly to it and is mounted further forward by the bell housing.
 Stu

2016 D4 Landmark current
2022 Defender D300 SE Gone Sad
D4 2014 XS Commercial - Gone Sad
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone Sad
D2 1999 TD5 E white - current 
 
Post #206329723rd Jun 2019 7:26 am
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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

Have you checked the wiring inside the wing you may have corroded terminals or damaged wiring going to the fuel pump
  
Post #206332723rd Jun 2019 9:21 am
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Euro4 it is then, thanks!

Not checked the wiring, but did replace the low pressure fuel pump.

Something I realised this morning is that it seems to happen at a 1/4 tank. Last night it was at 1/4 tank and had to stop a dozen times on the m25, got to the services and added some diesel to about 1/2 tank and it was OK, then this morning again at around 1/4 tank it did it again. Have added more diesel and it seems fine, so will test this theory, but I've no idea what that would mean is wrong with it Sad

Mike
  
Post #206333623rd Jun 2019 10:10 am
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

So the fuel level theory is debunked as it did it again twice with 1/2 a tank Laughing

Does anyone know of a write up around chaning a EURO4 HPFP?

Mike
  
Post #206354124th Jun 2019 7:59 am
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syngress
 


Member Since: 13 Aug 2018
Location: Roxwell
Posts: 37

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Took the plunge and ordered a new HPFP which arrived yesterday, so yesterday evening was spent stripping down - OH MY GOD what a nightmare job it is!!

Eventually everything was out and the HPFP removed. I think the crankcase vent oil separator was the hardest part to get out!!

Refitting was pretty easy, just remembering where it all went Rolling with laughter

Primed the pump just by turning on the ignition key, then fired her up and started straight away. Have driven 30miles and no issues so far, but then they only really reared their ugly heads when towing so that will be next week.

I'll do some searchs but how easy to do blank the EGR's on a EURO4? After removing the Y inlet and seeing how much crap was there, and also in the turbo intercooler hose that was only changed a couple of weeks ago has made me want to blank them off Laughing

Mike
  
Post #206469028th Jun 2019 4:18 pm
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Oswiperus
D3 Decade 


Member Since: 02 Apr 2010
Location: Chelmsford, Essex
Posts: 1590

United Kingdom 2005 Discovery 3 TDV6 SE Auto Java BlackDiscovery 3

Fingers crossed for you when you put your trailer on.
 Stu

2016 D4 Landmark current
2022 Defender D300 SE Gone Sad
D4 2014 XS Commercial - Gone Sad
D4 2016 hse lux montalcino red - Gone
D3 2005 se java black - current
D3 2005 base manual - gone Sad
D2 1999 TD5 E white - current 
 
Post #206520830th Jun 2019 10:34 pm
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ajn9000
 


Member Since: 28 Jul 2019
Location: Cornwall
Posts: 6

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Vienna GreenDiscovery 3

I have an intermittent 'engine system fault' warning but no codes. Does anyone know the what the software algorithm is which generates this warning? ie, what sensor(s) / sensor combinations trigger this warning? How can I find that out?
  
Post #207215929th Jul 2019 8:12 pm
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mtbell
 


Member Since: 20 Mar 2019
Location: Cumbria
Posts: 1

United Kingdom 2009 Discovery 3 TDV6 XS Auto Santorini BlackDiscovery 3
Engine system fault

Mine does this intermittently, only usually around town, it's never done it on a run so only a low speed fault. No codes and live values didn't show anything prior to the fault. Whatever it is doesn't have a sensor on it and when it does it the duration is only a second. Local indie suggested injector but wait to see how it progresses. You only know as sudden loss of power then by the time you have looked at the screen the message is disappearing.
  
Post #207248831st Jul 2019 8:23 am
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ajn9000
 


Member Since: 28 Jul 2019
Location: Cornwall
Posts: 6

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Vienna GreenDiscovery 3

I am very puzzled by this situation, but also very curious.

I am a chartered engineer working with very complex clinical equipment and I have never come across a situation where a [decent] manufacturer does not make available information relating to software functionality for fault finding.

Like a modern car, complex clinical equipment is a system of interacting components, and you need to understand the nature of the interaction.

Prior to owning a disco 3 I have not experienced this sort of problem with previous cars, so I've never been exposed to more complex fault finding situations.

We seem to rely upon the generated OBDII codes for fault finding, which is great, but were these codes are not generated (but 'engine system fault' is triggered), this is because the embedded software contains code which generates this warning, and for some people also sometimes triggers 'safe' mode, based upon a protocol which is receiving inputs from a range of sensors and doing some math.

If we knew what that protocol was, we could hone in on the problem, because we would know which inputs/sensors are being observed.

Without that information, we are just poking around in the dark trying to pick up clues and filling in the gaps with circumstantial information, particularly if the warning is intermittent. Eg, 'I have just fuelled up at a supermarket, therefore it must be due to poor fuel quality'.

Question Question for the moderator: is there anyone on the forum who has successfully discussed this with Landrover?
  
Post #20727181st Aug 2019 7:45 am
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