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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2240

United Kingdom 
If you blank without mapping out the EGR then it will present the same symptoms as an EGR stuck closed. I.e heat in the engine and will increase the potential for knocking.
Post #1058613 26th Jan 2025 12:00am
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o4dn



Member Since: 08 Jan 2010
Location: South West
Posts: 565

France 2009 Defender 90 Puma 2.4 SW Alaska White
I suspect there are differences in software even between Puma Defenders...

I have a couple of pals who bought their Defenders second hand from Spain, and they can blank the EGR at will, the MIL never comes up.

On mine, which I bought in the UK (a cancelled order for France initially), blanking the EGR without a matching software remap light up the MIL every time. “A Land Rover immobilized is a moral defeat for the driver and bad publicity for the vehicle, […] it's up to you to do justice to your Land Rover!” - Land Rover Driving Technique.
--
2009 2.4 Puma Defender 90 SW
1979 Land Rover Series 3 88"
Post #1058634 26th Jan 2025 10:49am
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keef9t



Member Since: 13 Mar 2016
Location: manchester
Posts: 183

United Kingdom 2007 Defender 90 Puma 2.4 HT Stornoway Grey
Following this discussion with interest as I have been considering a delete and can't decide.
Ianh suggests that a closed egr may cause engine heat and knocking.
I'm intrigued. If one of the aims of the egr is to have a slight cooling effect, doesn't that mean engine heat remains higher after a full delete.
Post #1058636 26th Jan 2025 11:22am
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2240

United Kingdom 
“Mapping out” an EGR consists of permanently closing the EGR and adapting the ECU map to cater for the absence of any exhaust gases that would have been utilised if the EGR was in standard operation. If done correctly by a reputable company then all should be ok when compared to just blanking the EGR.
Post #1058650 26th Jan 2025 2:28pm
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