Fault Codes U2023 and P0087

MMM Shellite , know it very well.

Electrician cleaning a 200KVA alternator on our trawler many years ago , had vent fans on etc but must have built up the fumes in 1 corner of the engine room , battery charger cut in and KABOOM.

buckled the 8mm deck plating , tore the exhaust bellows clean off the engine due to the deck lifting and a piece of 20mm stainless rod that was sitting on top of 1 of the engine room hatches was found on a roof about 100mtrs away. Luckily nobody died , but 2 very deaf and burnt electricians were eventually removed looking worse for wear.

Off topic I know but I haven't heard shellite mentioned since so it bought back memories of that event.

No I haven't tried the turn off / on thing as its usually my wife driving the car so not game to tell her to try it.

Cheers Ean

Cheers Ean

Sounds like a dangerous attempt to find a solution. Your analysis of the valve would seem to be on the money. I guess that is why in the UK they have exchange pumps available.

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Originally Posted by Ean Austral

No I haven't tried the turn off / on thing as its usually my wife driving the car so not game to tell her to try it.

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That was my problem. It *was* the wifes car. She handed me the keys and said (not unjustly) "If you want to keep this piece of ****, *you* drive it, I'm done".

(the rantings of an inebriated fool deleted)

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Originally Posted by BradC

That was my problem. It *was* the wifes car. She handed me the keys and said (not unjustly) "If you want to keep this piece of ****, *you* drive it, I'm done".

(the rantings of an inebriated fool deleted)

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well after the last weeks effort I think I will be getting the keys to the D3 plus the bill for her new car if this don't get sorted soon.
Anyway the car is booked in to the local guru up here late this coming week with the instructions either find a issue quickly or replace the HPFP with the one I just bought. Was going to do it myself but just started a new job and am working the next 14 days straight and I think by then I will be about $50k poorer and looking at a new car in the driveway .

Cheers Ean

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Originally Posted by Ean Austral

well after the last weeks effort I think I will be getting the keys to the D3 plus the bill for her new car if this don't get sorted soon.
Anyway the car is booked in to the local guru up here late this coming week with the instructions either find a issue quickly or replace the HPFP with the one I just bought. Was going to do it myself but just started a new job and am working the next 14 days straight and I think by then I will be about $50k poorer and looking at a new car in the driveway .

Cheers Ean

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Was it the HPFP? I have the same issue and suspect some dirt ingress after both heads were rebuilt. Drives perfectly then when you’re just cruising it’ll fault with Low Fuel Rail Pressure. Stop, restart and it’ll either drive for 500 miles or 1 mile before faulting again.
I have one injector reading 1314 so out of range but can’t see that would throw a low fuel rail pressure fault. LPFP checked and new filter installed and still does it time to time.

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Originally Posted by Rsys

Was it the HPFP? I have the same issue and suspect some dirt ingress after both heads were rebuilt. Drives perfectly then when you’re just cruising it’ll fault with Low Fuel Rail Pressure. Stop, restart and it’ll either drive for 500 miles or 1 mile before faulting again.
I have one injector reading 1314 so out of range but can’t see that would throw a low fuel rail pressure fault. LPFP checked and new filter installed and still does it time to time.

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Eans been off the board for a break, but yes it was. I have his HPFP on my bench awaiting a teardown along with mine.

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Originally Posted by BradC

Eans been off the board for a break, but yes it was. I have his HPFP on my bench awaiting a teardown along with mine.

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Thanks for that. I’ve had several garages try to diagnose this without fail because they can never reproduce it. Don’t know if you know but could an out of range injector cause that error? And I’m left wondering what the garage did in the rebuild to break the HPFP like this

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Originally Posted by Rsys

Thanks for that. I’ve had several garages try to diagnose this without fail because they can never reproduce it. Don’t know if you know but could an out of range injector cause that error? And I’m left wondering what the garage did in the rebuild to break the HPFP like this

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Could have been nothing. I spent months diagnosing mine precisely because it was hard to reproduce, but eventually it got frequent enough I could watch it actually faulting in real time on the IIDTool once I knew what to look for. If the injector was spilling badly then I suppose in theory it could cause low rail pressure. I wouldn't bank on it though.

I got to the point I was driving through it. "Bing", off the accelerator, key off, key on, back on the accelerator. If you catch it early enough it doesn't cause cascade faults and I could just keep driving. Infuriating when it happens from every 10 to every couple of minutes on a 4 hour drive and you can't just pull over and set fire to it.

Rsys - Ean explained the eventual fix to his problem here:

Not sure if im unlucky or lucky

Quote:

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Originally Posted by BradC

Could have been nothing. I spent months diagnosing mine precisely because it was hard to reproduce, but eventually it got frequent enough I could watch it actually faulting in real time on the IIDTool once I knew what to look for. If the injector was spilling badly then I suppose in theory it could cause low rail pressure. I wouldn't bank on it though.

I got to the point I was driving through it. "Bing", off the accelerator, key off, key on, back on the accelerator. If you catch it early enough it doesn't cause cascade faults and I could just keep driving. Infuriating when it happens from every 10 to every couple of minutes on a 4 hour drive and you can't just pull over and set fire to it.

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Lol. Unfortunately mine is an auto and the BING coincides with TRANSMISSION FAULT So it’s too late. However, having read this thread a couple of months back, I’ve been driving by taking my foot off the gas where I think it would normally fault like a shallow incline.
I would think a leaking injector should throw a Low Injector Pressure fault and not the fuel rail. Who knows? It’s a disco!

My rebuild happened after the dreaded oil pump failure.

One weird thing I have. If I pull the LPFP fuse, the LPFP still runs. Figure that one out. I’ve concluded that on a disco 3, nothing is as it seems