After a few seconds of running at full throttle I get a "restricted performance" amber warning, this clears by pressing OK on the steering wheel and clears completely after a few seconds. I thought this maybe due to poor quality petrol so have run two tanks of Shell super+ through it but it is still doing the same... don't get me wrong it's no great issue as there aren't too many opportunities to run at full throttle... at part throttle everything is OK...

I decided to run some live value tests today and found that the fuel pressure is dropping off on full throttle, after a few full throttle runs the fatty did throw an engine fault P0087-00






As you can see the desired pressure in blue (straight line) stays constant but the Fuel rail pressure and the Fuel rail pressure sensor - High range sensor both show that the pressure is dropping fast.

The fuel rail pressure high range sensor has flatlined throughout

The low range sensor appears OK...

The S/C has two high pressure fuel pumps that are engine mounted and run from a chain drive off the crankshaft.

This is fed from an in tank fuel delivery module that contains a filter in the top half, I have ordered one having found out about it from Google... JLR don't list a fuel filter for the 5.0 L322 S/C I tried to order a fuel filter when I got fatty but none is listed....

Has anyone else come across this low pressure problem..??

Does anyone know the difference between

Fuel rail pressure high range sensor and Fuel rail pressure sensor - High range sensor...??

Has anyone had to change the high pressure pumps..??

Any other info gratefully received...

Thanks

(Fuel filter is LRO14995 £75.36 from Duckworths) Just leave this here for info... Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Last edited by Haylands on 25th Mar 2021 8:16pm. Edited 1 time in total

Is it worth changing the filter as a start? Doesn't need to be OE to test if its the issue. 05 L322 4.2SC
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I've ordered one, it's on the way, I don't fit pattern parts to mine..  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Not had any problems with my SC under full throttle. But if you would like happy to repeat your test on mine and measure same sensors and see if this is normal graph or not, as you maybe looking in the wrong place and it could be a bad injector.

Thanks for the offer, it's definitely a low fuel pressure problem, as is usual with these things, easy to fix once you have found out what to fix...

I don't think an injector failure would cause a low fuel pressure fault or the symptoms I get but you never know...

I was planning to stick some injector cleaner in anyway just to see if it helped......

Cheers, be interesting to see what another S/C comes up with...  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Worth running a can of BG44k through it - it's the only type LR recommend and useful for cleaning the injectors anyway.

Link to the vid on the Fuel system video I mentioned in my PM in case it's useful for anyone else:

For anyone else with this fault....

Right... the fuelling issue is sorted.....

All 510 odd horses have returned to the stable...

As a recap... floor it and on wide open throttle above about 4000rpm it would hesitate and then finally "BONG" restricted performance, turn it off and on and everything was fine until next time... been like it a while now and not really much of a problem under normal driving...

It threw a P0087-00 low fuel pressure fault but not every time, mostly it threw no fault codes even though it had gone into restricted performance...

The JLR work through for that code is

Fuel Leak
Crushed fuel pipe
Fuel filter
Fuel rail pressure sensor
Lift pump (in tank)

(No mention of the high pressure pumps)

All those were checked or replaced with no difference whatsoever....

I then had a look around the USA Jaguar forums and found four instances of the same fault/symptoms and three were sorted by replacing the high pressure mechanical fuel pumps. The forth also had multiple misfire faults and needed new injectors as well...

New pumps were sourced

JLR part number LR011308

These are Bosch pumps and fit a lot of vehicles, either singly or in pairs...

Bosch part number 0 261 520 045

Other part numbers...8W93-9D376-AE / 0 261 520 046 / HDP-5-PE / AJ812357 / C2Z22287

Then came the fun part... I had read various ways to get to these pumps which are bolted to the bottom of the block on the off side. Most went in from the top by removing the alternator but after lots of head scratching and consultation with my mate who owns the garage the best plan seemed to be to remove the O/S/F drive shaft to allow a sideways assault on the pesky pumps, going in from the top means working blind to a large degree..... to prevent the hassle of getting the driveshaft out and then back into the hub I just removed the whole hub, suspension arms and shaft in one lump, after the disc and calliper were removed...




The location of the rear pump is shown in red, the front in Yellow...

Click image to enlarge

Good effort mate.

Every Time I see a thread come up about the 5.0 I want it more n more instead of an old m62 4.4

You would want one. It’s a brilliant engine, and very well matched to this car. It’s powerful, it’s fast, it sounds amazing under load. And it’s the cleanest environmentally friendly of them all which I still find hilarious and my mate Greta love it 😂

The only thing against it is the stock sound at idle. It doesn’t do it for me when you are outside and it’s idling. Not like any other V8 let alone V6 or V10 and definitely not V12 I’ve had. But with a slightly more aggressive exhaust that is easily overcome 😈

And some may hold the fuel consumption against it. Meh, yes it is thirstier but not by that much. There is only 8mpg between them.

Also, and I might be imagining things, but at first I wasn’t excited about the gearbox. It wasn’t bad but not great. However following a mega flush and reset it has adapted to my driving style and is now nowhere near as lazy and works well together with that 5.0SC. Sure it isn’t a dual clutch or dct but it can handle the power very well and is actually rapid to shift up and down.

I don't want one, I'll stick with the 4.2 for the time being

It is a wonderful thing to own and drive, stunningly sumptuous and a lovely place to be...  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Well done mate and thanks for the write up! Glad to see more infio going in to the 5.0 knowledge base. Out of interest do you know what it is that goes on the fuel pumps? Is it seals? Whats the mileage on yours?

You couldn't see any difference in new to old, I presume they have some sort of diaphragm inside, there are places selling refurbished ones...

I think just one of mine had gone bad as it was only at higher revs and need for fuel that the problems were apparent.

I have heard that if both fail it's a no start scenario...

Mine failed around 79,000 miles Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Bl4ckD0g wrote:

at first I wasn’t excited about the gearbox. It wasn’t bad but not great. However following a mega flush and reset it has adapted to my driving style and is now nowhere near as lazy and works well together with that 5.0SC. Sure it isn’t a dual clutch or dct but it can handle the power very well and is actually rapid to shift up and down.

Haylands wrote:

It is a wonderful thing to own and drive, stunningly sumptuous and a lovely place to be...