Hi Folks! I need to update you.
Haven't got the bluetooth dongle yet, will do eventually (just need to have one in general) but for now,
I've used an EGR cleaner, ran the car enough to make sure the DPF is clean, replaced air filters, cleaned MAF sensor, changed oil filter, and new 5w-30 fully synthetic oil, ran an engine flush additive upon changing oil, and there is a difference made to the problem I was having.
Remember I mentioned a Citroen C3 1.4 petrol I had a long time ago, which would go sluggish off a traffic light or uphill once warm? Which was sorted by an oil change? And that I suspect it may be something like that playing a role?
Well, it has been something like that playing a role. I haven't had a dead-emergence since flushing engine and changing oil, only notice momentary sluggishness trying to pick up after rpms drop 2 or 3 times, which may have more to do with the weird gear ratios combined with the weak engine than with anything else. It does seem to die down, but the engine still feels like it's breathing a bit - struggling to load rather than not responding, so quite a different feel.
All in all I'm happy with this difference and can accept that the car now must be performing the way it is expected to for what it is.
MPG still seemed low but that may be due to the particular journey that I have to take upon commute, as it include a LOT of stopping and creeping in the rush hour, and it's a short journey. So average is 30-40MPG on screen (before service: 45mpg real measurement at the pump after 100 miles, then 45mpg again after another 100 miles.) Today on a bit longer journey it yielded high 50's on screen, and with some Motorway miles it crept up to 60-62mpg. Any tiny uphill, or junction, and the screen loses 2-5mpg straight away. Average total mpg still around 45mpg. I'll do a real life measurement soon, but this seems to be about what I should expect from now on.
I still need to change the diesel filter as I already have the part in the boot, but need to know first if this car has a self-priming pump or if I need to prime the filter when I install it. And this would conclude the full serivce.
After that, the plan is to observe O2 sensor, run an injector cleaner, then some cleaning additives and prime diesel every once in a while. Also considering an oil catch can, is it worthwhile on this car?
Any other suggestions re: engine/fuel/injection/oil/turbo system health before I finish this topic and move on to the next problem I found (relating probably to the old accident it's had) in a new thread?