DPF Soot Loading

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TomsFocus
Posts: 2
Joined: Tue Feb 13, 2018 11:55 am
Vehicle: 2012 Focus 1.6 TDCi 115ps

DPF Soot Loading

Post by TomsFocus » Tue Feb 13, 2018 12:53 pm

Hi,

Can anyone tell me the difference between the 'closed' and 'open' soot loading percentages on FORScan and what a good ball park percentage would be for 40k miles?
Mk3 DPF parameters.jpg
Mk3 DPF parameters.jpg (102.04 KiB) Viewed 1445 times
I've recently bought a Mk3 1.6TDCi Focus but with the lowish mileage for year want to make sure the DPF is ok. Seems to be very little pressure differential but I'm not sure if I should be worried about the 57% soot loading there?

Also, possibly unrelated but the engine is very jerky when cold - EGR, MAF and temp sensors all seem to be working ok. There is a PCM update available but I'm trying to rule out any faults before having that done so is there anything else you'd recommend checking?

Thanks
Tom

denbo
Posts: 191
Joined: Mon Feb 06, 2017 3:00 pm
Vehicle: ford focus 16 zetec

Re: DPF Soot Loading

Post by denbo » Tue Feb 13, 2018 7:55 pm

Yes you are correct, the soot load is too high. Take it for a long run and recheck. It might do a regen but this is a Peugot engine so don,t hold your breath. Do not do a static regen....at that % it could burn the car down. Much safer to get it cleaned.

TomsFocus
Posts: 2
Joined: Tue Feb 13, 2018 11:55 am
Vehicle: 2012 Focus 1.6 TDCi 115ps

Re: DPF Soot Loading

Post by TomsFocus » Sun Feb 25, 2018 3:04 pm

Does no-one know what the difference between the 2 soot loads is then? :?

I've since seen that it can go well above 100% on both if there's a fault, but still regen fine once the fault has been rectified so it looks like 57% isn't that bad.

Anyway, it seems to be regenerating fine despite my borderline mileage for a DPF, currently sitting at 2% and 19%, down from 10% and 57% when I first got the car. I'd still like to know what the difference between the 2 is though lol!
Mk3 DPF Parameters 3.jpg
Mk3 DPF Parameters 3.jpg (77.25 KiB) Viewed 1317 times

evrr82
Posts: 1
Joined: Thu Mar 01, 2018 12:05 pm
Vehicle: Ford Kuga, SUV, 2.0TDi, 150hp, 2015

Re: DPF Soot Loading

Post by evrr82 » Thu Mar 01, 2018 5:06 pm

Hi,

I also noted those 2 parameters.

The only difference between them is Open and Closed Loop. The first one, "Closed Loop" might be an estimate of filter loading based on differential pressure using feedback from real sensor. "Inferred Open Loop" might be a backup estimate of filter loading based on something like fuel burnt, motor hours etc in case if data from sensor is unavailable.

However, that's only my guess.

Blinkston
Posts: 3
Joined: Sat Mar 03, 2018 9:36 pm
Vehicle: Fiesta 1.4 TDCi 2002

Re: DPF Soot Loading

Post by Blinkston » Fri Mar 09, 2018 6:56 am

On the cold running fault have you checked the glow plugs are working as I had the same issue on one of these.i had a plug fail and run very lumpy until it was warm

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