Do you really blank the EGR Valve ?

[Ean Austral]

Gday All,

Since blanking my 08 TDV6, and having a fault register 2 time since, I have looked at the EGR set up and admittedly im no expert, but I fail to see how using the BAS kit or any other availale for that matter you actually do blank the EGR's off...it seems to me all you do is stop the gas going back into the inlet side.

I dont know how to download the pic, but the EGR valves sit at the end of the ( I think it may be a cooler of some sort EGR cooler maybe ) so by removing the pipework and blanking as per the existing kits available, the exhuast gases can still enter the EGR valves and could still cause issue's as they are still connected.

Maybe I just dont understand how they work, but this is how my simple brain see's it... I would think a plate between the end of the cooler and the EGR valve would be the proper way..

Thoughts.

Cheers Ean

[400HPONGAS]

Ean , EGR means Exhaust GAS recirculation . If No Exhaust gas can get into the inlet tract then there there is no Recirculation. The rest of the EGR valve is only to cool the Exhaust gas ,so you dont have plus 200C -500C gas going into a Plastic manifold .(Ps you did remove both side pipes didnt you !)
Your only issue is the fault codes it throws and you knew that before you attempted the EGR blockoff ..

[Ean Austral]

Ean , EGR means Exhaust GAS recirculation . If No Exhaust gas can get into the inlet tract then there there is no Recirculation. The rest of the EGR valve is only to cool the Exhaust gas ,so you dont have plus 200C -500C gas going into a Plastic manifold .(Ps you did remove both side pipes didnt you !)
Your only issue is the fault codes it throws and you knew that before you attempted the EGR blockoff ..

Yep I did remove the pipes, and I understand what you are saying, but if you look at the valve itself it has an electrical connector on it, so if it still gets exhuast gas and a carbon build up, and as the EMS is still reading the senser on the valve then it has the potential to still fail.
The reason I say this is because the pipe to the inlet comes off the top of the EGR valve assembly so it seems that the valve will still tell the butterfly ( which is removed ) when it should open and close, so in my mind the valve still has the potential to fail.

I did know that from what I have read that you couldn't blank post 07 models, but I am just looking at different options before I give up and reconnect the EGR system.

Other than the 2 times a fault has registered in 6 weeks of having the blanking kit fitted, the car runs fine.

Maybe I shouldn't try and understand the system and just let it be.

Cheers Ean

[TerryO]

Hi Ean,

why would you reconsider reconnecting the EGR valve? What's the big deal if the fault code occassionally shows up?

In my mind it has to be a lot better not to have all that exhaust crap being recirculated through the engine. I'm happy I had mine disconnected.

Having said that when I read the codes using the Hawkeye it still shows a EGR fault but as far as I know apart from showing a fault code it does nothing.

cheers,
Terry

[Ean Austral]

Hi Ean,

why would you reconsider reconnecting the EGR valve? What's the big deal if the fault code occassionally shows up?

In my mind it has to be a lot better not to have all that exhaust crap being recirculated through the engine. I'm happy I had mine disconnected.

Having said that when I read the codes using the Hawkeye it still shows a EGR fault but as far as I know apart from showing a fault code it does nothing.

cheers,
Terry

Gday Terry,

The only part that worries me is that when the fault code registers the car goes into limp mode, and I rarely drive the car as I have a work car, so would hate to see it happen when SWMBO is pulling out into traffic.

I know thats looking at the extreme end of things, but, I know the last time it happened was when she pulled up at a set of traffic lights and when they changed she copped a mouth full of abuse for going so slow.

I am more interested to try and keep it blanked thats why im trying to understand the system more, but my knowledge of EGR's is limited, but when I removed the system from my D2 you remove the whole valve assembly, on the D3 you dont, so am just wondering if they can still cause issue's.

I think next time if the fault arises I may not clear it and see if that makes any difference, as once you turn the car off then restart it you wouldn't know there was a fault unless you access the cars computer.

I would prefer not to hook it back up as I seen the remnants of 80,000kms of EGR crud when I cleaned out the inlet side where the pipes come into the system.

Cheers Ean

[TerryO]

Gday Terry,

The only part that worries me is that when the fault code registers the car goes into limp mode, and I rarely drive the car as I have a work car, so would hate to see it happen when SWMBO is pulling out into traffic.

I know thats looking at the extreme end of things, but, I know the last time it happened was when she pulled up at a set of traffic lights and when they changed she copped a mouth full of abuse for going so slow.

Cheers Ean


Hi Ean,

I can see why you have concerns, it would concern me as well.

cheers,
Terry

[CaverD3]

After a certain MY the D3 will log a fault if you blank the EGRs. Early models were ok. Do a search on www.disco4.com

[Learner]

Hi Caver,
Ean is aware of that. He's just testing the impact in practice.