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Absolutely! I have missed something, and scratching my head as to what. Proper diagnostics will def help, and so going to invest in a GAP IID tool. My generic one is great, and very useful for giving an idea. TBH I change cars quite regularly and so never invested in a specific one. Our Merc...

Yep. That is on the list to look at too. As advised we are going to take the plunge and get a GAP IID tool. Have refrained before as often change our vehicles, and so our generic tool for all vehicles has always sufficed. However if can fix this issue may keep RR as its alright! Apart from not...

Advanced factors list and sell the sensor separately. Thanks for your help so far.

Thanks. Going to plug back in...

As a highly qualified IRTEC road transport engineer, workshop foreman and with 40+ years (yes... old skool with an absolute hate of all modern electrics etc... I trained with spanners...) My expertise lies within the HGV and agricultural sectors though and very different to cars. I am fully...

Fuel gauge reads full... Which it is as we filled that morning. Have got some fuel out and checked and all ok with that...

Inertia switch?

Def timed correctly. Haven't reset switch... cant find it!

Brand new genuine HPFP...

Have 6 bar lp 0 hp...

'Thumb over end of pipe' as you put it, but know what I'm looking for... (40 years c&g ag, heavy plant and hgv mechanic) but this has beat me. Will try and get proper readings when back on it...

Plenty of pressure there...

The fuel is getting up there so those pumps are unlikely to be the issue. Fuel is getting to the HPFP...

I have a 2012 4.4 tdv8 which a week ago just cut out. No spluttering or anything. Just stopped. Got it home and had the fault code P0088... changed fuel filter, fuel rail pressure sensor and fuel pressure sensor. Fuel was getting to HPFP but not coming out. Changed the pump today and still...