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Splitpin



Member Since: 07 May 2013
Location: Midlands
Posts: 100
United Kingdom 
theorangebandit wrote:
I totally understand the idea of the egr and if it could've been achieved with a cleaner burn it would not be an issue
EGRs only active when cruising. When cruising you do not require maximum power or torque. Warm air burns more efonomacally and so is ideal for motorway. But it just doesn't seem to function right

I know the guys at BAS and IRB have achieved some fantastic things from the moment I joined the forum I have followed there work.

Problem is that in older engines like the 300 tri an EGR blank kit was a bolt on affair and I fitted hundreds. Yet nowadays we need to map them out . Roll in people with the machines and to.e to re write an ECU


It's nothing to do with the air being warmer, it's because of it being through a burn cycle already.

I would be interested to see how it could be achived with a cleaner burn?

Currently this is all high pressure egr, low pressure which will be on its way can be run almost all the time.
Post #251179 14th Jul 2013 10:25am
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AndyS



Member Since: 18 Aug 2012
Location: London
Posts: 597
United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Sumatra Black
My EGR is very noisy so I get to hear what it's doing while driving along. As far as I know, it only engages at idle engine speeds or on the over-run. So it wouldn't affect engine power as it shuts as soon as you accelerate of give it some welliie. I don't see it as such a bad thing if it's cutting emissions but not affecting usability.
Post #251212 14th Jul 2013 1:50pm
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landybehr



Member Since: 17 Apr 2013
Location: -D-
Posts: 173
AndyS wrote:
.. I don't see it as such a bad thing if it's cutting emissions but not affecting usability.



depends on what you focus on.
AFAIK and itīs already said above the EGR and oxygen-less air recycling is there to reduce the unwanted NOx which the Diesel-catalysator cannot get rid of as well as on petrol engined cars. Downside is a less economical burn of fuel - as it cannot be guaranteed that everey molecule of Diesel will find oxygen in the combustion chamber (see - you take effort to cool down compressed air to increase the densitiy of oxygen, but the EGR is there to do the opposite). You will get more particulates - which the DPF has to cater for. And you get worse fuel economy. Would be nice to hear if the fuel consumption was reduced for those who had the EGR closed all of the time by a remap.
Post #251221 14th Jul 2013 2:26pm
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B4Lamb



Member Since: 21 Mar 2015
Location: Abergavenny, Wales
Posts: 233
Wales 2007 Defender 90 Puma 2.4 HT Galway Green
I fitted a new EGR just under 2 years ago in my 2007 defender 2.4 TDCI because the original (although I can't it was the original as I'm the 3rd owner) became eratic, and kept throwing up the MIL light. This replacement has now packed in, not even doing the chugga chugga at engine off and its throwing the MIL again. Of course the warranty on them is only 1 year. What a piece of junk they are. I'm tempted to fit a blanking plate but reading the notes above I see it may cause other issues and effects. They are bloody fiddly to get in and out and they are not cheap to buy.

Has anyone successfully repaired one? "You are never to old to learn something new"
Post #630290 10th Jun 2017 12:47am
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pannawonica



Member Since: 21 Nov 2010
Location: Clackline Western Australia
Posts: 568
Australia 
Most diesels only achieve a 70% burn of the induction charge, so I don't understand why reducing NO is the holy cow when you are clearly using more fuel to do the same job! LPG gasification of diesel would make it cleaner with less particle matter. However introducing diesel soot which is abrasive with EGR is a total crazy. Thumbs Up
Post #630329 10th Jun 2017 11:47am
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B4Lamb



Member Since: 21 Mar 2015
Location: Abergavenny, Wales
Posts: 233
Wales 2007 Defender 90 Puma 2.4 HT Galway Green
Refer to my post on "EGR Fault" in this Puma section. You will see I managed to fix the EGR. It turned out to be an electrical connection fault withing the EGR body. An easy fix with and a more reliable connection method was used. The EGR is maintainable to a degree so it's worth taking them apart. Most garages sadly wouldn't bother though, maybe due to labour costs. Rolling Eyes "You are never to old to learn something new"
Post #631890 16th Jun 2017 10:14pm
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