Disco 3 intermittent limp mode - AGAIN - Help required
hi all,
looking for some assistance if possible, when driving my disco 3 (2006) any further than approx 20miles it will intermittently drop into limp mode, I've had this before which ended up being a tail light bulb but i don't remember it throwing up so many codes on the GAP tool.
Today when i read the codes after the initial limp mode (20miles ish into my journey) it had all the codes below apart from the P0087 Fuel Rail System Pressure to low. this only appeared after the 2nd or 3rd limp mode. (see codes below)
Ive read on a few posts that this fuel pressure code is one that often appears as part of limp mode being activated and not actually an issue, is this the case? and do any of the other codes raise a red flag for anyone?
I have checked all bulbs and no issues with them, i intend to check the pressure and current pull at the LP pump in the next day or so and will order a new fuel filter (was changed approx 10k miles ago).
Anything else worth checking? I have a feeling that this time round its not going to be a simple bulb fix this time round, and pointing towards a HPFP fault
appreciate any help/advice
Thanks Martin
13th May 2021 9:01 pm
Lrstaylor
Member Since: 04 Oct 2018
Location: Kent
Posts: 589
If you have tried everything else as I did.......hpfp cured my problem also Ashley on here had the same issue hpfp cured his as well. Unfortunately your the wrong end of the country for my mechanic.
thanks for the info, did you have the same P0087 code?
engines on 170k and from the history i don't think its been changed so maybe its time
hopefully a bit more diagnostics will point me in the right direction
martin
13th May 2021 11:12 pm
Lrstaylor
Member Since: 04 Oct 2018
Location: Kent
Posts: 589
Yeah same code p0087 replaced the hpfp with a eurocrap parts item still had the same fault but only in summer not winter chased the fault for a long time and I mean a long time and many many parts to eliminate then went back and checked the so called new hpfp from ECP and was found to be leaking at the seal of the main shaft.
Another hpfp problem solved......no longer use ECP.
Going to do a bit of digging this afternoon just incase there is anything obvious, but I feel you may be correct with your diagnosis.
Although I find it strange that the P0087 code did not display the first time it went into limp mode but did on further limp modes
14th May 2021 9:02 am
N5Fav
Member Since: 28 Jan 2021
Location: LEICESTER
Posts: 134
How old is the fuel filter?
That would be my first thing to try, & what make is it?
Only fit a good quality filter. A friend of mine recently had his Cherokee Jeep serviced at his usual garage.
Afterwards his Jeep had difficulty starting, and lack of power issues, turned out his newly fitted fuel filter was the problem, his garage didn't know that 'Crossland' Filters are now a cheap brand that is pretty much ECP budget brand. Fitted a Bosch filter and all was good again1994 Defender 300tdi 110 commercial
2007 Disco 2.7 XS Buckingham Blue
1959 Standard 10 Coffe & Cream
1974 Vauxhall Magnum 1800 estate Olivine Starfire Green
1994 Renault 19 Cabrio
1995 Kawasaki GPz 1100
followed robbies guide to check the condition of the LP pump and from what i can gather the pump is not pumping, removed the schrader internals and fitted a hose to the schrader fitting and jumped the relay to turn pump on and nothing is coming out of the pipe but getting 12volts (14V when car running) at the fuse. the clamp meter i have isn't reading anything when pumps running.
Has anyone seen this before? seems strange that the pump isn't pumping when still making a circuit, would think it would be open circuit if not pumping at all.
guess next step is to drop tank and test pump in situ
martin
15th May 2021 1:08 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
Replace the fuel pump relayAndrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
15th May 2021 1:31 pm
Metal_Detective
Member Since: 10 Nov 2018
Location: Earra-Ghàidheal
Posts: 50
I had a very similar fault to yours (limp mode becoming more frequent and worse when cold)and I ended up dropping the tank before finally replacing the HPFP with used one. Not too bad a job in the end but I broke a couple of plastic parts and the job's taken much longer than planned. I haven't finished yet so can't say if the fault's finally fixed or not.
My lpfp tested good but I dropped the tank to clean it out (awkward) check the pump strainer (pretty manky but not the root cause) and also to examine the wiring (all good).
I had bought a cheap replacement pump for the tank but after reading about them failing early I gave the old pump a good bench test, changed the strainer and refitted it.
If I were you I'd make sure your pump is deid before going near the tank. If it helps my new, unused pump has a resistance of 9.5 Ohms.2016 D4 SDV6 Landmark
2006 D3 TDV6 manual (deid)
2003 D2 TD5 manual on B100 (sold)
1998 300TDi manual (sold)
1994 300TDi manual (sold)
1972 Range Rover manual, Perkins engine (sold)
1966 S IIA truck cab, broke in half (sold as a kit)
15th May 2021 2:07 pm
Lrsg
Member Since: 10 May 2020
Location: Norway
Posts: 77
I would caution against spending more time and effort chasing after a cheaper fix. P0087 points to the HPFP, or to the fuel filter being blocked. In your case the filter is recently renewed, so you will need a new HPFP I'm afraid. Not cheap, but you can find refurbished used ones on ebay for about £350. Which is what I did last year.
Well I have a confession to make, turns out my meter was goosed and the fuse was blown and not getting a circuit with the multimeter set to read amps. Tried again with jumping the relay with a bit of wire and using my clamp meter and got a reading of 4.2 amps. Managed to source a genuine filter today and replaced it and it “seems” to have fixed the issue. Took the car for a long run this afternoon and no limp mode.
Reading through my history folder and it’s actually closer to 18months since the filter was changed but still only about 10k miles since done.
15th May 2021 7:53 pm
kseventy
Member Since: 02 Sep 2014
Location: London
Posts: 42
Lrstaylor wrote:
If you have tried everything else as I did.......hpfp cured my problem also Ashley on here had the same issue hpfp cured his as well. Unfortunately your the wrong end of the country for my mechanic.
Good luck with it.
Yes, cured my issue. Very similar issues and error codes. Was worse when weather was warm.
I got my pump as a recon from eBay.
15th May 2021 8:18 pm
Lrstaylor
Member Since: 04 Oct 2018
Location: Kent
Posts: 589
Kelman70 wrote:
Where did you get your 2nd pump from?
Going to do a bit of digging this afternoon just incase there is anything obvious, but I feel you may be correct with your diagnosis.
Although I find it strange that the P0087 code did not display the first time it went into limp mode but did on further limp modes
The 2nd pump cam from ECP under warrenty they refused the labour claim and said they cant prove its faulty so it's going back on the shelf for thr next poor mug.
There is a company on here gets good reviews for exchange hofp
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