Range Rover sport 2.7tdv6 2007 non starter

hi,
I am new to this forum and hoping someone can help me, I purchased a 2007 Range Rover sport 2.7tdv6 three months ago and aren’t having much luck. In the short time I have had it it’s had new heated seats, new heater matrix and a new turbo pipe, the current issue is- while driving on the motorway I lost acceleration but the engine was still idling, it showed every warning there is on the dash ( engine fault, gear fault, hdc fault, parking brake fault + every warning symbol was on ) it rolled to a stop on the hard shoulder, I turned off and tried to restart but it wouldn’t. I had it towed to the mechanic who did the previous work but he specializes in Petrol models so is stuck. He cleared all previous fault codes and turned it over producing 1 new code,
Incorrect fuel pressure. He contacted Land Rover direct who said although not 100% it will be the high pressure fuel pump at a cost of around £1500. I have spoken to another independent LR specialist who says it won’t be the pump, it will be the fuel filter as the car is overdue it’s service and have no idea how well it had been serviced before.
I admit I rushed into the purchase of this vehicle but am determined to make the best of it.
I hope someone can steer me in the right direction as I am getting conflicting information and obviously don’t want to spend £1500 and it still not work.
Thanks for you patience in reading the lengthy post

So do the cheap stuff, change fuel filter and make sure that fuel is getting to up pump, you are confident engine is turning over on starter ? And check your battery, these cars like it fully charged

Assume someone has checked that the fuel pump belt at the back of the engine hasn’t snapped? It’s not timed so no damage if it’s snapped just cuts fuel.
It can be changed with the body on the car regardless of what LR day.

Thanks for replies, yes definitely turning over and battery is fully charged, I will get him to check the belt and f ok what he’s told me there is a high pressure pump and a small one with a bleed valve just for starting. He says when pressing valve it spits out about an inch whereas a petrol engine would spit about 6ft, he thought this was an issue but was told it only needs to be 0.3bar on this engine?

Update
We have ruled out fuel filter, low pressure pump so fitting high pressure pump on Saturday. Fingers crossed
Got genuine pump and belt kit for £710 + £250 fitting so not as bad as I thought.

Does it fire up on ether?

lee brotherton said:

Fingers crossed
Got genuine pump and belt kit for £710 + £250 fitting so not as bad as I thought.

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That's a lot of money to spend, if it's not pump at fault.

I've never heard of a Lion HP pump failing. The crankshaft is much more fragile than the HP pump.

Has the live data for the rail pressure been checked while cranking? That's what I'd be doing, before splashing out a grand unnecessarily.

Hi, yes the live pressure while cranking was low, new hp fuel pump fitted yesterday and it’s running great
Thanks for all replies