Thread: EGR blanking

Originally Posted by DiscoMick

Makes it illegal of course, since it would fail an exhaust pollution test, but that's your choice.

Illegal - yes
Fail the pollution test - Nope

Yes I agree would not fail standard emission test - as a general statement EGRs are closed at idle and under power and only open under trailing throttle when most of the naughty gases are produced. Yes there is more too it and the the above statement is only a general statement.

Would the link from the first post work on a 2011 d4, 2.7l?

this is something I’ve never considered (heard of!) but seems like a lot of good sense to do it.

The plates Appear to be a physical block I presume this is on the exhaust air coming back in, does that not out additional strain elsewhere to get the required airflow?

Originally Posted by garrycol

Yes I agree would not fail standard emission test - as a general statement EGRs are closed at idle and under power and only open under trailing throttle when most of the naughty gases are produced. Yes there is more too it and the the above statement is only a general statement.

I understood the EGR is needed to pass the current exhaust test, which is why it it fitted. Is that not correct?

Originally Posted by DiscoMick

I understood the EGR is needed to pass the current exhaust test, which is why it it fitted. Is that not correct?

Will pass a standard test for a roadworthy - for sure if doing a complex test like those required for vehicle certification on a rolling road in a scientific setting etc then no.

Ask someone from NSW where annual testing is done if they have failed their annual roadworthy because they have their D3 blanked.

Originally Posted by Lukeis

Would the link from the first post work on a 2011 d4, 2.7l?

this is something I’ve never considered (heard of!) but seems like a lot of good sense to do it.

The plates Appear to be a physical block I presume this is on the exhaust air coming back in, does that not out additional strain elsewhere to get the required airflow?

No. Won’t work on anything post D3 (and even some of the D3 will error).

I have a Same spec/year as yours Luke and mine are electronically programmed closed...

Originally Posted by Lukeis

Would the link from the first post work on a 2011 d4, 2.7l?

this is something I’ve never considered (heard of!) but seems like a lot of good sense to do it.

The plates Appear to be a physical block I presume this is on the exhaust air coming back in, does that not out additional strain elsewhere to get the required airflow?

I tried this on my 08 D3 , the kit basically blanks the 2 pipes that you see come from each EGR up to the Y piece on top of the engine. As Tombie has correctly said , it only works on some D3's and it seems only before 2007. Mine would be fine for a few days then it would just randomly throw up the engine fault . In the end I got sick of it happening so I removed them.


I know of 1 member who has disconnected the EGR's on the engine and has extended the plugs and has them sitting taped up in the engine bay , this makes the ECU see they are still connected but the gases are not getting put back into the engine.


Cheers Ean

(Simple version) Later engines calculate flow based on EGRs being functional. Blanking them gives an out of range reading and causes a fault.