Member Since: 06 Mar 2017
Location: Lost
Posts: 5044
Always better to replace the part indeed
Although to be honest the 2 stroke idea was only cited by me as a "shot in the dark" to see if it could help you in the short term. I'll have to find another guinea pig now. yµ (idµ - eAµ) ψ=mψ
1st Jul 2020 7:43 pm
wedgev8
Member Since: 17 May 2019
Location: Kerpen
Posts: 181
To Richard:
In all your posts I cannot find the fault code which comes up with the limb mode. Is it really only the P0000 Code?
I can't believe. I am very interested in the fault code read by a good diagnostic tool. The code should look Pxxxxx-xx
1st Jul 2020 9:50 pm
white rover
Member Since: 30 Jun 2020
Location: perth
Posts: 13
wedgev8 wrote:
Before getting a new HPFP you should test with the diagnostic tool. for example with the IID tool you can see the live values of fuel pressure and PCV and VCV in a diagramm while running. And read the chapters in the Workshop manual. This is füll of information about the complete fuel system.
Wedgev8 ! turn out after doing some more research on the OBD2 tool I brought, I can monitor all of the sensors while driving, Now I feel like im getting somewhere even though the problem is not solved.
best place to get a Workshop Manual for the Disco ? and any chance you know of a good thread to find what kind of readings i should be seeing while driving ? the tool Provides me with data in % for the PCV and VCV on a trip around the block just then they seem to both be different but ranging from 13% with no throttle to 55P% with full Throttle at 3000rpm.
photos attached are the amps drawn with ignition on and the flow of the fuel release valve in the engine bay with ignition on.
2nd Jul 2020 3:51 am
RichardLlanfyllin
Member Since: 30 May 2019
Location: LLANFYLLIN
Posts: 17
wedgev8 wrote:
To Richard:
In all your posts I cannot find the fault code which comes up with the limb mode. Is it really only the P0000 Code?
I can't believe. I am very interested in the fault code read by a good diagnostic tool. The code should look Pxxxxx-xx
Sorry. Yes. P0087 - Low Fuel Rail Pressure. The weird thing is that other when it goes into limp mode, the car runs like a train. No misses just smooth. Startup is fine, no smoke nothing.
I had the heads rebuilt and refitted and this only started happening after than. The injectors are reading fine (within range) so it leaves the HPFP and that damned sticking valve which only decides to stick when you're cruising and just that little bit of extra pressure is needed.
The rebuild by a local garage was a disaster. First I had a leak from one of the leak off pipes. Then a leak off pipe came off and gave me a trail of smoke like the red arrows. Then another leak off problem. Then the garage closed due to covid. Meanwhile, still smoking from the other side, I took it to another garage who diagnosed one rocker gasket had failed and a leak from the servo pump. I'm just wondering if the leak on the leak-off system could cause the pump to fail, or has a poor installation failed the pump. Or is it a mere coincidence and the pump was about to fail anyway (a friend of mine in the police once said "there are no coincidences")
2nd Jul 2020 9:14 am
wedgev8
Member Since: 17 May 2019
Location: Kerpen
Posts: 181
White Rover, you can use the forum search and look vor Workshop manual download. You will find some links.
With your tool you have to see the live values for the pressure and the two control valves PCV and VCV in a diagram and compare them in context. Maybe you can see the moment when the limb modes comes up and then you know more.
2nd Jul 2020 3:10 pm
white rover
Member Since: 30 Jun 2020
Location: perth
Posts: 13
Hi Guys,
So I think Ive hit the nail on the head with the P2290 code I keep getting, I believe it is caused from a faulty fuel temperature sensor, In my case anyways. Ill confirm tomorrow when I test it with the multimeter. However this morning before started the car I took a reading on my Scan tool and the fuel temperature sensor had a reading of 76degrees Celsius before even Starting the car !
Outside air temp was 12 Degrees Celsius.. The manual stats the car will start to limit the aloud fuel pressure in the rails when the fuel temp goes above 85 degrees Celsius, in my case that happens in a couple of minutes after starting and after about half an hour im seeing 100 Plus degrees celsius.
I am wondering if Anyone knows the part number for this ? my car is a 2010 disco 4 with 2.7 v6 Diesel.
I called up Landrover and they only sell as a complete unit with plumbing and release valve, Retailing for $450 AUD. All I need is the Sensor.
Ill post again when i test with a multimeter and after hunting down and fitting a new sensor !
8th Jul 2020 7:27 am
lronly
Member Since: 01 Nov 2013
Location: Mellieha
Posts: 67
I am still where i had started off.... i have so far changed the HPFP the LPFP the fuel filter housing and fuel filter the fuel rail pressure sensor and took off and sent for recon all 6 injectors..... i still get P0087 and P2290
Either one or the other.
I have been trying fir 6months on smd off with this car
8th Jul 2020 5:46 pm
RichardLlanfyllin
Member Since: 30 May 2019
Location: LLANFYLLIN
Posts: 17
Ok. So this is interesting.....and maybe explains other types of Limp mode.
I took the car back to the original garage and told them that it keeps going limp since they rebuilt it. When I fetched it later, rather rudely the owner said "We've checked the whole car, reset everything and I've driven the car 30 miles and there is nothing wrong with this car and frankly my mechanic is sick of this car so you'll have to take it to a main dealer if it goes wrong now" - really he ought to familiarise himself with social media and the damage I can do to him!
But! I have now done 500 miles and it hasn't cut out once. And I am beginning to develop a theory of what might have been the issue because I am sure they found something and didn't want to admit it.
When it went limp before, it would happen when I'm going up a smallish hill and instead of staying in 6th, it would drop to 5th and go limp. Or on a steeper hill, when it went from 4th to 5th with reduced revs, it went Limp. Now, when I drive up the same hills it doesn't drop to 5th! It seems to have the required torque/boost to stay in 6th and even giving it some gas doesn't drop it into 5th like it did.
So that leaves me with a a couple of possibilities:
1. something wasn't plugged in properly and sent spurious data down the bus
2. Maybe they had left a leak on the turbo side (but I would think there would be some regular power loss)
or....and here's where I need someone's help
3. did they do a transmission/adaptive throttle reset? And has that fixed it?
I am sure they didn't top up the gearbox after the rebuild because he didn't charge me for any and some fluid mustve been lost when the radiator was removed.
But.....fingers crossed, there seems to be no more bongs
8th Jul 2020 6:26 pm
white rover
Member Since: 30 Jun 2020
Location: perth
Posts: 13
lronly wrote:
I am still where i had started off.... i have so far changed the HPFP the LPFP the fuel filter housing and fuel filter the fuel rail pressure sensor and took off and sent for recon all 6 injectors..... i still get P0087 and P2290
Either one or the other.
I have been trying fir 6months on smd off with this car
have you checked your fuel temperature sensor ? that is what seemed to be giving me those codes !
you can test the resistance easy with a multimeter !
9th Jul 2020 12:10 pm
RichardLlanfyllin
Member Since: 30 May 2019
Location: LLANFYLLIN
Posts: 17
lronly wrote:
I am still where i had started off.... i have so far changed the HPFP the LPFP the fuel filter housing and fuel filter the fuel rail pressure sensor and took off and sent for recon all 6 injectors..... i still get P0087 and P2290
Either one or the other.
I have been trying fir 6months on smd off with this car
Well. I'm sure (as you can be as a Disco owner) that my problem is cured. Without the garage admitting that they fixed anything, all I can go on is what I have observed and that appears to be a stiff intercooler hose. Before they didn't fix anything, the hose was quite soft as if boost pressure was missing. Now it is stiff as boost comes in so I suspect the rebuild left an air leak somewhere before the intercooler or even before the turbo.
If this was a petrol car, then I could explain the "Fuel Rail Pressure low" (or equivalent) as a lean condition which would throw a code. Perhaps someone here might be able to explain it, but for some reason the ECU thinks that more fuel is called for and not delivered so assumes a low fuel rail pressure situation when in fact it is a missing air and boost problem.
The reason I am sure it is a boost issue is this changing of gears. I can go up the same hills now and because the boost pressure is much better, the transmission doesn't bother changing down; I suspect the lost boost meant that the engine couldn't deliver the torque required so drops a gear but there's a disparity between fuel required and fuel delivered and a code gets thrown up.
The obvious pain is that all of the damned modules are linked and go off-line one after the other making it almost impossible to diagnose.
9th Jul 2020 3:37 pm
French Collection
Member Since: 15 Apr 2020
Location: Aix-en-Provence
Posts: 48
white rover wrote:
Hi Guys,
So I think Ive hit the nail on the head with the P2290 code I keep getting, I believe it is caused from a faulty fuel temperature sensor, In my case anyways. Ill confirm tomorrow when I test it with the multimeter. !
White Rover, did you find and fit a new sensor? Did it finally solve your problem? Where on the car can I find this sensor? I have been starting to think that there is a temperature-related element to my fault.
Yesterday rove 30km without a problem Parked for 15 mins, and about 10km into the next leg of the journey it faulted. Restarted, cleared fault and continued without problem. I
Mine faults even when driving steadily at any speed - acceleration does not trigger fault. I have already changed filter for an LR one and replaced LPFP. Pressure, pump current and flow all about half what they should be. Starts and drives perfectly - except when it faults.
Acceleration does not trigger the fault. It seems t happen more when I am travelling at steady speed, including low speed and not under load. Even when slowing down for a stop sign once....
29th Jul 2020 7:47 am
c-shef
Member Since: 28 Mar 2018
Location: Sheffield
Posts: 4
Sorry to fire up a old thread but my D3 lit up like a christmas tree with low fuel pressure codes.
the LPFP is drawing 3.5-4A and here is a video of it running with a rev upto 3k. Does the pump look ok or is it more likley to be the HPFP. Any help would be greatly appreciated as I need the car and every specialist is full booked for a minimum of a month. Iv got every tool known to man and have no problem fixing it just would like some point in the right direction on what to replace before i fire the parts cannon!
9th Sep 2020 7:36 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2463
Fuel pressure should be a lot higher even on tickover, just replaced my LPFP if you need to do it dont forget to buy some of the caged nuts that go in the chassis and hold the fuel tank in place mine fell to bits
9th Sep 2020 7:52 pm
GARYF123
Member Since: 21 Sep 2020
Location: Leeds
Posts: 4
Hi,
Does anybody know if it’s possible to contact Robbie?
Gary.
21st Sep 2020 7:40 am
John Andre Ognheim
Member Since: 29 Oct 2013
Location: Bergen
Posts: 111
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