fullfatrr.com - View topic - Forced DPF Regeneration using Gap iid.

Advertise on fullfatrr.com »

Forum · Gallery · Wiki · Shop · Sponsors

Home · FAQ · New Posts · My Posts · PMs · Search · Members · Map · Calendar · Profile · Donate · Register · Log In

Home > Technical (L322) > Forced DPF Regeneration using Gap iid.

Page 5 of 5

Print this entire topic ·

Range Rover L322

Member Since: 03 Sep 2019
Location: South West
Posts: 304

JayGee wrote:
If the DPF has been gutted there would be no pressure differential across it and thus it would show zero g soot load. A new or clean DPF will flow more exhaust gas at a higher pressure differential than an old and partially ash filled one so again the point at which it needs to initiate a regeneration may be higher. Just drive and monitor it and only worry if you get warning lights.

Absolutely correct. I also agree with the sentiments on this thread to leave it alone, don't fix what's not broken!. There is a propensity to mis-diagnose issues with L322 DPFs - the technology was not perfected when they bolted them on to sate the then new emissions rules and performance is not uniform.

Here are the trigger levels:

19.6g Demands Regen. The regen demand frequency increases exponentially as soot increases from here so when it gets into the 20s it will demand more and more. I have tested this exhaustively by deliberately driving short hops. As soot increases you only need to drive over 37mph for a few seconds to trigger a regen.

Amber Warning On 23.3g
Amber Warning Off 17.46g
Red Warning On 27.5g
Red Warning Off 21.25g

I would be interested to hear how your readings continue. 31.5g inferred with performance un-affected is unusual.
231 demanded regens on 135,000 miles (so average 1 regen every 584 miles) is a low number but within tolerance if your car has been mostly open road.

Please keep us updated!

. 2012 L322 4.4 TDV8 AB low mileage - a peach
1986 V8 Defender 90 County ex-Swiss Army - Red everything....

My preferred Independent: Roy Hardy. R & B AUTOS LTD, 20 Brook Road, Wimborne, Dorset, BH21 2BH (Ex LR Chief Technician)

Last edited by Range Rover L322 on 11th Sep 2022 9:56pm. Edited 2 times in total

27th Aug 2022 11:00pm

Phoenix

Member Since: 16 May 2022
Location: Gone
Posts: 1631

Gutted DPF's will set a DTC due to lack of differential pressure, you either need to have the ECM software modified or introduce a downstream pressure drop within acceptable limits (2-5 Hpa is a good differential for a low DPF load). Ash load is calculated, not measured.

27th Aug 2022 11:24pm

nambFFRR

Member Since: 07 Aug 2018
Location: United Kingdom
Posts: 167

2016 Range Rover Autobiography SDV8 Corris Grey

I’ve been chasing some error codes for a while and whilst checking some sensors, noticed the DPF remaining volume states 0 pints? What does this mean? Does it mean it’s full or is it empty? Do I need to do anything? I occasionally get a restricted performance error along with P050E, P041C and P040D codes with bank1 exhaust bank 212F/100C temps (failed??). Any thoughts??

10th Sep 2022 12:34pm

Baltic Blue

Member Since: 13 Aug 2015
Location: North Wales
Posts: 3675

2011 Range Rover Vogue SE TDV8 Baltic Blue

Sorry, no idea why, but DPF remaining volume always reads 0.
100c is default (cold) value reading for exhaust temperatures sensors.
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

10th Sep 2022 1:18pm

nambFFRR

Member Since: 07 Aug 2018
Location: United Kingdom
Posts: 167

Thanks Baltic Blue….👍

11th Sep 2022 9:16pm

Page 5 of 5

All times are GMT + 1 Hour

Jump to

< Previous Topic | Next Topic >

Posting Rules

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum