Hi Mike, I use a similar screen set up.

Matt's IID is new and has had the software update giving new values.
Mine is not updated like yours.

As for ERG - yes agree you are getting effective regenerations. I guess I am wondering about the general function of the exhaust vs 02 intake gas mix effectively controlled by both the throttle body or the EGR.

An example is as members have found - if hoses are split it creates very fast fill rates.
I take that to mean too much oxygen creates soot.

So I found it interesting not so much from a regeneration POV but from a fill rate POV.

Matt's Terraclean - no idea how effective and whether it would reach the EGR. The intake tract is vast if you include intercooler, turbos crossover valve and back to the engine.

Mike do you clock miles between regenerations?

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Greg,
I haven’t clocked the exact miles between regens, but it is c400 miles approx. I will log exact figures from now.

Nino has posted in the past when he has stripped all the plenum, throttle body etc, to clean it.
It doesn’t look difficult, just very very messy.

I certainly agree that air leaks anywhere on the intake causes massive soot buildup.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Hi Matt,

Just a thought, setting aside warranty for a second - you took your car in, LR diagnosed your problem, they asked to do some expensive work and you followed their advice.

So whilst not spoiling relations with them, you have a good position to hold e.g.: "why did you say all this work was needed when the source problem has not been addressed"

Good luck!

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

Do these very experienced mechanics agree that the car is definitely experiencing far too many DPF regens ? ,...If so, what do they consider acceptable/ normal/expected for a car with such low mileage ?

Do they have access to a 2nd level technical support department at JLR..? ...If so, what do they recommend?/ suspect/ suggest/ as a next step.?

Several reports of v6 engine failures have been reported as being caused by oil contamination due to DPF regens causing oil dilution.
Is their any clue to be gained from why these engines were regenerating and causing the failures??

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

A bit a further anecdotal EGR>DPF chat from piston heads:

Quote:

Re DPF:
...a sticking EGR valve - most common problem by far also the most commonly misdiagnosed. Don't let anyone tell you it needs replacing, as they can be stripped and cleaned, after which, they operate perfectly. Could also be the cause of the rough running, as if it's stuck open but the PCM thinks it's closed, it is essentially unmetered air.

No problem with mine, except I keep accidentally kicking it out whilst driving and collecting live data.
Big feet
I have ordered a extension cable with a right angle output to try and see if I can solve the problem.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

Hello All,
Last Wednesday (10-07) my DPF was cleaned.
The pictures on page 1 were very helpful in showing them where to cut the exhaust: a big thanks to Greg!

According to their measurements they removed 70 gram of ashes/soot.
They said that's 15 liters of 'dust'.
They also did a pressure differential measurement before/after and it went from 50mbar to only 5mbar.
And they found 2 codes, P244B (DPF pressure differential to high) and P2459 (DPF regen happening too often) and cleared them.
With my OBDII reader I did not see those codes and after clearing the red DPF warning I never say any new warnings.

Based on the flow measurement values on page 1 I guess we can now conclude that a clean DPF flows 390m3/h giving 5mbar pressure difference.

The car drives like it did before.
Maybe a little better response to slight throttle inputs.
It sounds different too, a bit more exhaust noise.
And it definitely uses less fuel.
I'm now 120km into a full tank and the display shows values I've never seen this low before, still at 9.5l/100km
Those 120 km were 3 daily commutes of 18km one way with some city driving.

Unfortunately I didn't get the chance to take pictures as they didn't allow costumers into the workshop.
I didn't want to 'demand' to be able to take pictures: you don't want to of the people that still have to work on your car...

Matt,
I wonder if the MD can see P2459 errors on his OBD reader? and if their is any historic data stored ?

Also Spitfire S, what mileage has your 2012 done ?

Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

I have found it in the workshop Manual.

Hope you can read screenshots.
Mike.

Click image to enlarge

My RR is a 2012, bought in 07-2018 with 116000km from a RR dealership, now at 132000km.
The workshop I went to used Bosch ESI[tronic], version 13.0.3567.
They gave me a printscreen showing the OBDII codes.
I wasn't there when they got the codes, a quick search showed it's workshop diagnostic equipment.

I guess the '15 liters of dust' has to be taken with a grain of salt.
One can take all the down out of a 20 liter pillow and fluff it up to be 100 liter, that kinda thing.
The 70 gram difference is a better value, as is the 5mbar.

The DPF is, in my opinion (now), in the catagory of maintenance RR never mentions but needs to be done every 100000km or so.
Just like the gearbox oil & filter change (if you want to keep the car )

Not sure on that one Matt, I do a bit of digging....

If you think we have problems:
https://www.thecarexpert.co.uk/forums/topi...-problems/

. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway

SpitfireS wrote:

...they found 2 codes, P244B

What’s the definition of calm and steady?

Almost impossible not to drive without touching brakes, or slowing slightly for a corner
Ie slowing from 50 to 40 on a bend

Even on autopilot the new system brakes when
it sees a car in front.

Just wondering:) Filters are in fact so good that in certain circumstances, when the ambient air is already polluted, a diesel car will tend to extract more particles from the air than it emits. Emissions Analytics worked with........etc etc

He who dies with the most toys wins...

A bit of an update on my soot fill rate.
Yesterday I did a 62 miles each way motorway trip.
My readings were... home 13.3g..Crewe.. 16.8g., so 3.5g increase over 62 free flowing motorway miles.
Return ...very heavy traffic most of the way, but 19.7g back home, so 2.9g , but definitely no attempt to do a slow speed regen on last 5 miles of quiet 30 mph local roads.
This morning I have just done 20 miles of mixed roads, including 10 motorway at c60mph. temps started to rise and soot level down to 16.3g, then I got stuck in heavy traffic so regen stopped , but again no sign of any slow speed regens.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair

I am pretty confident that this is how B.B fills.....
Eg, from 3g after a good regen to 19g after 300 miles of mixed driving. ...300/16 = 18.7 miles/g.
Mike. G reg 2.5VM Vogue Portofino red 1991- 1999
V reg 2.5td P38 Rioja red 1999- 2006
53 reg td6 Vogue Oslo blue 2006- 2015
11 reg 4.4 TdV8 Vogue SE. Baltic blue 2015- date.
https://www.fullfatrr.com/forum/topic56162...tty+affair