Haven't blanked off injectors yet, but that could def be something to try. Does seem unlikely though as fuel isn't getting there. Next week when off of nights... Did think about the non return valve too, and if that is open would allow fuel through... Spoke to LR today who are equally...

Dont think so. We did check, but they are all different sizes and so can really go on in one way. Besides, nothing had been touched before it cut out, so doesn't explain why it suddenly cut out

Ok. So this making my head hurt trying to work out what is happening here! And following pipes... Again... right back to the beginning but remembered something that I thought was really unusual, but put it out my mind. Why I don't know. I noticed fuel coming out of the return line from the...

What I meant was we cant find it as an option on our diagnostic tool. Or in which menu to look under. Hopefully someone can shed some light on that.

Not that we can find... looked in all the usual places and cant find one or find info on there actually being one...

Please can you tell me more on that? We cant find where it would be or an option for it. GAP iid tool... Thanks

Still no joy. We have gone through everything from the very beginning. Full tank of fuel. Gauge reading correctly. New fuel filter. Genuine. New sensors. New Bosch HPFP. Fitted and timed correctly. LTB01083 modification done. New CKP. Fuel rail sensors replaced. Some live readings... Fuel rail...

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...