Post 2007 egr blanking info

[Fatso]

Found a good read on how the egr on post 2007 obd landrover engs work .

Google " disco 3 knowledge base "
Then - click ," Home disco3. uk knowledge base "
Then - Site will come up then click or pick , " Maintenance keep your d3 running smothely .
Then click , "MAP "towards bottem of page for forum then checkout page 26 for info from " rich11235 "

May be of interest re why we cant blank off the egr on these vehicles .
By the way i am going out to check my MAP sensor .

[Ean Austral]

Thats for that, it explains why I was having the intermittent trouble's when I blanked mine, and the fault that came up was excessive air pressure, or something to that effect, and it did trigger the limp mode. Also explains why it happened at low speeds mainly.

Now to find a 10 yr old computer wizard and a spare ECU for him to play with.

Cheers Ean

[Fatso]

Thats for that, it explains why I was having the intermittent trouble's when I blanked mine, and the fault that came up was excessive air pressure, or something to that effect, and it did trigger the limp mode. Also explains why it happened at low speeds mainly.

Now to find a 10 yr old computer wizard and a spare ECU for him to play with.


Cheers Ean

Looks as though there maybe an answer in doctering the MAF to fool the ecu ??? . I think he knows how to do it but cant say ,only hint .

[Graeme]

Whilst the author has described the general environment, he has omitted the role of the butterfly in limiting fresh air flow. People seem to think that removal of the butterfly is necessary because there is no longer any airflow from the EGR valves when blocked. I haven't encountered any reports from when the butterfly is left in place. This may or may not still trigger an airflow fault but IMO is worth a try, as the margin for MAF vs MAP value discrepancies might be wide enough. Removing the butterfly even without blocking the EGR valves is quite likely to cause an airflow fault anyway although it wont be an EGR fault.

Unless reported as causing faults beforehand or an ecm map modification becomes available that effectively disables EGR, I will block my 3.0 EGR valves without removing the butterfly once warranty has expired by such an extent that LR is most unlikely to provide any post-warranty goodwill repairs. That's probably still 12 months away.

[Fatso]

Well checked out my MAP sensor today and as expeted was one solid hunk of sticky black goo !!, as the hole leading into the sensor was blocked it was not going to do its job properly . All cleaned out now ,so will see if any difference is noticible fuel and power wise tomorrow .

[Ean Austral]

Whilst the author has described the general environment, he has omitted the role of the butterfly in limiting fresh air flow. People seem to think that removal of the butterfly is necessary because there is no longer any airflow from the EGR valves when blocked. I haven't encountered any reports from when the butterfly is left in place. This may or may not still trigger an airflow fault but IMO is worth a try, as the margin for MAF vs MAP value discrepancies might be wide enough. Removing the butterfly even without blocking the EGR valves is quite likely to cause an airflow fault anyway although it wont be an EGR fault.

Unless reported as causing faults beforehand or an ecm map modification becomes available that effectively disables EGR, I will block my 3.0 EGR valves without removing the butterfly once warranty has expired by such an extent that LR is most unlikely to provide any post-warranty goodwill repairs. That's probably still 12 months away.

According to the D3 uk site this has been tried unsuccessfully, also drilling small holes in the butterfly has been tried,and refitting the EGR's pipework but with the blanks still in place but a smaller hole drilled in the blank on 1 side only..this seemed to have some success.

In saying all that my car when blanked registered different faults to some others who have tried, and I believe it can be piped to fool the sensers, ...BUT... the thought of having to live with a car with operating EGR's compared to the fight's I would have with SWMBO ( who now seems to be the sole owner and driver ) if it kept going into LIMP mode like it was, there was no contest...hence replacement of the EGR pipework and butterfly.

For the time it takes to try, it would be well worth it.

Cheers Ean