Have you tried the O ring on the fuel pressure regulator on the hp fuel pump

https://www.tuning-diesels.com/synergy-2

Did you tighten the oil filter housing correctly??

Yes

:confused:

i'd take the chance if they come with a 2 year warranty

sounds cheap for the pair OEM are around £150 each you can get GKN for £150 with a 2 year warranty from lrdirect

pin 3

https://www.landyzone.co.uk/land-rover/good-lr-garage-fred.95630/

Mine passed with a bypass fitted

Well it doesn't matter for the parts you looking for

does it really mater???

Are you sure lp fuel pump is working

:confused:

Is there a way to make a manual by-pass in case of any future problems?

^^^^^^ What he said:D

I already suggested that Nodge, that was my first thought. Said he changed it when he replaced the HP pump

dont think so, looks like an early disco wheel

fuel rail sensor

The HP fuel pump is chain driven by the engine, usually only fails by leaking. Pointless changing it, Was the regulator and o ring replaced when you replaced pump? Split o ring can cause non starting