Technical Ducato 2018 DPF Clogging % 2.3 150bhp Campervan

[grahamt]

Hello, I'm hoping some technical experts might be able to shed some light on this query.......

I ran FiatMultiEcu scan software, out of curiosity more than anything, on my previous Ducato 2014 2.3 Campervan and each time the % DPF clogging reached 100% the ECU would trigger a regeneration process and ran for about 7 minutes at which point the % clogging would drop to about 10%.

My new van has passed the 100% clogging and the ECU has made no attempt to trigger a regeneration process, it's now parked and showing 113%. The last 50 miles were motorway driving and prefect for the ECU to trigger a regeneration sequence.

My question is have Fiat changed the % point at which the regeneration is trigger on this Euro 6 engine? My previous engine was Euro 5

Thanks for any technical advice others might have of this latest engine.

Graham

 

[whine0]

On the genuine fiat witech system Iv never seen 100% clogged filter even with knackered sensor never seen reading like that on Euro 5 or 6 and 113%? You’ve got real trouble if that it’s that clogged I would of thought ,I do have fiat multi scan so I will try my version on Euro 6 and compare to witech and let you know

 

[grahamt]

Thanks for the reply.....As I mentioned with my euro5 van the multiscan software always showed the triggering of a dpf regeneration at around 100%, on one occasion it did go to about 105% before triggering. The technical support on the multiscan software mentions "normal clogging " of the filter up to 150%, my last van I ran for 10k miles with no issues.
In addition I've noticed the % clogging increasing faster on this euro6 engine than the euro5....just wondering if this is due to the production of more particles due to the euro6 addition of dpf egr recirculation of gases?
My last euro5 engine would run for 1000 miles between regens but this new one appears to be just 250 miles, a significant deteriation in my opinion?
It will be interesting to see what your multiscan software shows vs fiat ecu reader.
Cheers Graham

 

[corcai]

Sounds excrlessive is it a lot of short journeys? May be a case of less NOx at the expense of more soot.

 

[grahamt]

Mostly cruising, journeys of min 40 miles. Yes i agree sounds excessive too but as you say less Nox but more soot......time will tell over the next few months whether this is the case as I build up the miles

 

[RS3100]

I can't help with the figures as I've never paid to much attention to them, other than to check the DPF status is normal and number of regens/mileage at last regen.

Have you read the descriptive text in MES when the DPF clogging parameter is selected though?

To paraphrase, the filter is not considered as clogged if the percentage is less than 100%. Values lower than 200% are not considered critical, but above 200% it is recommended to perform a regeneration!

That seems to suggest that 100% displayed by MES is not actually 100%, and 200% displayed is not actually 100% either, which means that 100% displayed must equate to a real figure of less than 50%

Confusing, isn't it!!!

I had a VW technical document somewhere that I thought I had saved, although I can't find it right now, but that explained that a clogging value of something like 130% had to be met before the vehicle would attempt a regen. I know that's not Fiat, but it does suggest that figures of greater than 100% are not unusual. Again, when is 100% not 100%

 

[grahamt]

Rs3100......yes it's confusing indeed. According to multiecuscan normal clogging is up to about 140% with limp mode nearer the 200%,
I'm not too concerned but wondered if others have experience of when the euro6 engine initiates a regen. My euro5 always did it at 100%. Also the clogging appears to be happening more quickly with this engine.
Graham

 

[grahamt]

For those that have viewed this thread I thought I'd add a conclusion:-

The initial data readings were obtained using multiscanecu v3.1 which I used on my old euro5 van. Although the software brought up an error code of engine ISO number not recognised the data values displayed looked good. Anyway I've upgraded to v4.1 which includes my ISO ECU code and the % clogging dropped from 113% to 77%.
I've run the van again and at 100% clogging the ECU triggered a regen, exactly as happened on the euro5 engine.
The only significant difference between the two engines is the regen distance, euro5 triggered a regen about every 900 miles, the euro6 engine triggers at about 450 miles........dpf looks physically the same size so less Nox seems to mean more soot.

I should add the euro5 engine was 130bhp and the euro6 engine is 150, can't see that making much difference to soot production though.

 

[RS3100]

That explains it then. You can get some odd results with unrecognised units.


FWIW my Euro 5+ 150 averages about 850 miles between regens according to MES.

 

[grahamt]

That explains it then. You can get some odd results with unrecognised units.


FWIW my Euro 5+ 150 averages about 850 miles between regens according to MES.

So your euro5 regens are very much like mine were but this euro6 is running at twice the frequency, I'd like to understand if this is a consequence of the new dpf egr system that was installed to meet euro6, most other makers went down the adblue route.