Vi(ano) 2014 - W639, )M651, EU 5B Engine Overhaul.

[m80]

Seems like there is low fuel pressure, no surprise.
It builds and then decides to fire up.

I've seen a network error, canbus some where I think. It's possibly related but with my limited knowledge don't know why. But I did remove all electronics from the fuse enclosure knowing it would less than totally protected while outside for some time.
I'm not going back in there while it's raining.

 

[m80]

I've compared fuel pressure during the starting cycle withe the 211, and they're similar enough for me to conclude that it isn't that.
After a start and sitting for maybe 10 minutes they both report approx 50 - 60 psi fuel rail pressure.
After a start, at tick over the 211 is 3k+ psi, the Viano 4k+ psi.

So my thinking is that the injectors need bleeding properly and that there is air in the system somewhere, not uncommon according the Google.

Where I was loosing the ability to monitor this was using iCarsoft (Kpa) as it looses its readout due to the OBD voltage dropping during a start, same for my Torque on the HU's. By monitoring with Torque on my phone, still using OBD via a BT sender, that doesn't happen and I can get a true comparison.

 

[m80]

Saga update.

My diagnosis was poor fuel pressure on cranking. The reconditioned injectors being the culprit due to excessive leak of was my analysis.

Mr Injector specialist was seemingly too busy to pick up the phone, when his receptionist promised a call back that didn't materialise either.
So I bought 'new' injectors from PF Jones, and sent a letter to Mr Injector. He phone v soon after getting that.
"They were tested",
"needs to be bled on Star",
"bring 'em in, I'll test and charge if I find nowt, bring fuel cos bad fuel can screw injectors v fast."
If honest that didn't inspire much customer service confidence.

Injectors arrived, I fitted. It started but after cranking, no surprise.
2 more starts were similar. Pub time.
Next morning it started easily.

Since I've had to resolve a DP wiring issue. It had previously been in contact with the exhaust and melted the 3 cores together. The result was a still a good 5v supply, but the return was 12 ohm. I soldered in a 3 wire patch and that solved it. But if you've been reading you'll know that threw me for some time.

The problem with having more than one issue is failing to find one definitive direction to resolve.

 

[m80]

If you're still interested, cos it goes on, toooo flippin much.

The ECU has the new codes and adaptations done, I've reset all values for injector's.
I didn't think the hi pressure bleeding was needed as it was running well, done anyway.

iCarsoft performed 2 good running regens and brought soot down to less than 10%.
I've cheated the system into thinking Ash is zero. My thinking being that if the van regens often it will be excessive ash build up, so to then replace the DPF.

It starts on the button.
It runs well but,
maybe 30 seconds after a start it emits white smoke, no smell, but I've only filled with water so far.
That is gone within 1 minute or two of running.

Blip the throttle and there is a puff of black smoke.

I've removed intercooler pipes and dipped the intercooler for water, none. That's because at strip down I found water in the intercooler. I did pressurise the EGR and it's cooler while it had water within. No leaks.

I've split the PCV pipe. I sealed the inlet to the turbo. I connected a length of pie from the cam cover outlet and left it open to atmosphere. After 30 - 40 miles of heavy driving it was dry.

Still head scratching.

 

[m80]

A new turbo cartridge greatly reduced the white(ish) smoke. To a level where it may be condensation.

A new DPF has eliminated the puff of black smoke when blipping the throttle at standstill. Adaptations of the DPF and injectors at idle carried out again. Now I'll monitor for the soot and ash build up.

The MOT is booked for Thursday as I reckon it's ready, and hoping they agree.

 

[Nicebutdim]

A new turbo cartridge greatly reduced the white(ish) smoke. To a level where it may be condensation.

A new DPF has eliminated the puff of black smoke when blipping the throttle at standstill. Adaptations of the DPF and injectors at idle carried out again. Now I'll monitor for the soot and ash build up.

The MOT is booked for Thursday as I reckon it's ready, and hoping they agree.

Well done. Sounds like you’re there now. Hopefully it will reward you with many more years of trouble free running.

 

[m80]

Today is a historic day, for me.
It shall be an anniversary to be celebrated from this time forth.

It passed the MOT with 0.01 whatevers emissions.
Inspector comment, bloody 'ell this lot must've cost yer.

More than he knows,
more than it should've.