I always preach "You can't go wrong by changing the fuel filter" on a Diesel but in this case it is not short of power at WOT so I haven't done one yet.
No, it revs poorly in neutral as well.
I think the DPF is OK too.
I agree with the red herring.
The App seems good and most systems seem paranoid about track 1/track 2 plausibility. So I would expect a code to be flagged.
Both gearbox and ABS have been checked to see if a torque reduction is being requested but both appear OK, no fault codes certainly.
It has just come to mind that the vehicle has recently had a gearbox replacement, I will check with the customer to see if there is any apparent relationship between the two events.
I intend to scope fuel pressure actual/demanded and injection duration when I get on it later.
It just seems like the accelerator demand is being rejected.
Shaun.