EGR Cooler change - blank & map out..

[KevTwopines]

Hi,

Just wanting to improve my understanding..

If an EGR Cooler is blanked off.. Will this mean that that the DPF blocks up / blocks up quicker?

Also, will the DPF still continue to function as VW intended / function effectively without adversely effecting the engine?

Understand that the vehicle will require the EGR Cooler mapping out. But keen to understand the real world effects of doing this?

Thanks in anticipation of a load of helpful and knowledgeable responses.

Best regards

 

[KevTwopines]

Just seen this too, so very keen to understand if EGR Cooler blank and map out also means DPF delete? Darkside Developments - Diesel Particulate Filter (DPF).

Thanks

 

[chris9809]

If you get rid of your EGR valve or blank it off then your DPF won’t last long. If you remove your DPF then your vehicle should fail it’s MOT now because the DPF is there to try and remove harmful stuff from your exhaust fumes for the benefit of the planet etc etc.

 

[mmi]

If you get rid of your EGR valve or blank it off then your DPF won’t last long.

What's the reasoning behind?

 

[Paynewright]

I’d like to understand this too.

I’d rather have to get the DPF removed and back flushed every 50k miles than the inlet tract clog up with soot.

 

[Rob1978]

I’d like to understand this too.

I’d rather have to get the DPF removed and back flushed every 50k miles than the inlet tract clog up with soot.

I have had mine blanked over 10k mile's with no issues seems to regen as normal once, may be twice per tank full of fuel

 

[DaveD]

On a previous car, a Landrover, I blanked the EGR because it was problematic. No DPF issues 50K miles later when I sold it.
I'm not suggesting that the same is certain to apply to a VW engine, but it worked for me.

 

[DXX]

If you get rid of your EGR valve or blank it off then your DPF won’t last long. If you remove your DPF then your vehicle should fail it’s MOT now because the DPF is there to try and remove harmful stuff from your exhaust fumes for the benefit of the planet etc etc.

The purpose of the EGR system is to cool combustion to reduce the production of NOX as it causes ill health.
The purpose of the DPF is to filter out soot particles from incomplete combustion as they cause ill heath.
Without the EGR combustion takes place at a slightly higher temperature, it is then more efficient and less soot is produced to be filtered out in the DPF.
If anything the DPF will go longer between regenerations.

 

[Rob1978]

The purpose of the EGR system is to cool combustion to reduce the production of NOX as it causes ill health.
The purpose of the DPF is to filter out soot particles from incomplete combustion as they cause ill heath.
Without the EGR combustion takes place at a slightly higher temperature, it is then more efficient and less soot is produced to be filtered out in the DPF.
If anything the DPF will go longer between regenerations.

I have to agree with DXX. I'm not a mechanic or engine specialist , but it certainly makes sense to me. I can only assume some companies that blank the egr via software means the dpf won't regen because it won't see the egr valve closed. But could be wrong. The tafmet I fitted has so far had no adverse effects on performance or dpf performance.

 

[JOG]

The purpose of the EGR system is to cool combustion to reduce the production of NOX as it causes ill health.
The purpose of the DPF is to filter out soot particles from incomplete combustion as they cause ill heath.
Without the EGR combustion takes place at a slightly higher temperature, it is then more efficient and less soot is produced to be filtered out in the DPF.
If anything the DPF will go longer between regenerations.

I do love your engineering brain!