![]() | Home > Maintenance & Mods (L322) > 4.4 TDV8 EGR and DPF removal |
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matthews Member Since: 09 Aug 2016 Location: Leeds Posts: 111 ![]() ![]() ![]() |
Update after my previous post Empire tuning haver now got back to me so will correspond and try to come to some arrangement , Aviator I'm afraid your info on the regen process is flawed , it will happily regen and much lower revs but is tied in to speed , if amber light comes on it will regen at around 30mph and continue to regen even at idle when stopped in traffic , watched it happen on gap whilst monitoring soot levels , a good steady run of over 50mph on the motorway will happily start and complete a regen so trundling along at 60/70 is fine , I've found the cruise control can cause issues of quick soot build up (especially when towing) as it increases the throttle too slowly and for too long with the car locked in 8th so overfuels rather than kicking down and getting the speed up , I'm sorry to say but the CC is terrible at holding a steady speed on up and down roads (only slight inclines) compared to D2 and D3.
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Aviator Member Since: 11 May 2025 Location: Berkshire Posts: 17 ![]() ![]() ![]() |
I took it on a long drive down the M4 this evening. I held the revs at 3000 and speed at 70mph. The soot level actually started to increase! Even with dynamic regeneration engaged. After 30 minutes it was getting slowly worse so I switched it back in D (drive) and then it started to drop soot levels until
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steve2347 Member Since: 09 Jan 2025 Location: Reading Posts: 32 ![]() ![]() ![]() |
Was this an active regen (started by the car) or did you do a forced regen via the gap iid, Aviator?
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Aviator Member Since: 11 May 2025 Location: Berkshire Posts: 17 ![]() ![]() ![]() |
I tried High revs driving down the motorway which only made it worse, so I forced a regen and continued with high revs, which only increased the soot level. It only started to decrease when I switched gears back to D and the revs dropped to about 1500. |
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matthews Member Since: 09 Aug 2016 Location: Leeds Posts: 111 ![]() ![]() ![]() |
While i've been monitoring mine i found the best way to increase soot levels is heavy throttle and high revs , steady cruising in D seems to be the trick and hoofing it is the worst , monitored it back down the A1 from scotch corner to Bramham turn off and it stayed at a steady 13.5 g just about all the way (tuggin 1.5t of tin tent so 60 ish and 1200rpm in 8th) , once i got off A1 and started fighting round Leeds to get home it went up n up till it started to regen in stop start traffic at about 24/25g, continued dropping even when stopped at lights right back down to around 7g then started rising again, by this time i was home . So it does work most of the time . |
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steve2347 Member Since: 09 Jan 2025 Location: Reading Posts: 32 ![]() ![]() ![]() |
Thanks Aviator, that's very interesting to know.
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Range Rover L322 Member Since: 03 Sep 2019 Location: South West Posts: 340 ![]() ![]() |
https://www.fullfatrr.com/forum/topic48068.html?highlight=dpf
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steve2347 Member Since: 09 Jan 2025 Location: Reading Posts: 32 ![]() ![]() ![]() |
I’ve gone through that entire thread nearly twice now, so I’m probably as familiar with it as anyone could be without having contributed.
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