What's an ERG and what will it do if I delete it?

MillsyFR

Active Member
Feb 6, 2011
63
0
Linlithgow
As title says really, here about people deleting them from their car, what does it do and how do you do it? I've had the lower boost hose popping off my pd130 and someone recommended deleting the erg?
 

krussel

Active Member
Oct 31, 2008
1,713
2
Hertforshire
Quote:

The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. This results in a cooler, more complete burn of the fuel which decreases you car's noxious emissions by prohibiting the formation of some harmful gases.

And:

The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine. The exhaust your EGR valve recirculates also prevents the formation of Nitrogen related gases. These are referred to as NOX emissions, and are a common cause for failing emissions testing. Unfortunately, your EGR valve can get stuck, causing NOX gases to build up. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on accelertaion.

So directs exhaust gas back into the engine which is not really good when the engine needs clean air. If you un-plug it or totally blank it off your engine management light (EML) will come on, although this can be switched off via a Vagcom link. What most folks do is buy a blanking plate with a small hole (or drill one themselves) which allows a small amount of gas through to fool the sensor and keep the light off.

Most people agree the car runs better with the EGR blanked but a few have reported excess smoking under hard throttle, so its a grey area really and you kinda pay your money and take your choice. Its on my list of "do's" now mine is out of warrenty along with de-cating the exhaust at some futre point in time.

Hope that helps ;)
 
Last edited:

DEAN0

Old Git
Feb 1, 2006
5,421
1
412
Preston - UK
Just to point out that the EGR only operates at PART throttle.

If you floor it everywhere the EGR will not be doing anything.


There are four ways to delete it.

1. Just pull the vac hose off the EGR and blank it off - some cars show a fault with this so it can't be done this way.

2. Put a blanking plate in to the exhaust feed pipe ( this can also throw up a fault ) - a popular mod is a smaller hole gasket rather than a blanking plate.

3. Have the EGR deleted in the software as part of a remap but leave it on the car.

4. Have the EGR deleted in the software as part of a remap and also remove the EGR with an EGR delete pipe.
( I am not a big fan of this method because you also remove the anti shudder valve along with the EGR. )
 
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