I blocked it on my old MK2 diesel, didn't do any harm and mpg was better.

 

I blocked mine off and also had it written out via a remap and for me mpg has not changed but the engine is more responsive and runs smoother. I blanked mine off early srping this year and so far I havent had any problems and I am currently in Devon with my Caravan where I used half atank of fuel to get here from Cheshire so I am more than happy with that. I have also noticed that I no longer get any delay from pulling away from a standstill which is a common Vectra C Deisel problem. I have heard stories of blanking EGR's can cause premature Turbo failure and hot running but again I have no issues and the temp guage stays where it always has once hot and that is in the middle.

 

Iam going to give mine a good clean out at the weekend. Might even give it a service. it's slowly got worse on the old mpg front, when i first got it i was getting 57 mpg now iam getting mid 40s.

 

Is it a VAG? Just watch you don't harm the ASV when taking it off to clean. Also heard rather than blanking it off totally, use a blanking plate with a 3-5mm hole in it. (this is unless you plan to map it out)

 

nope it's a (dare i say it) peugeot 2.0 hdi

 

I blanked mine off but have a 5mm hole in the blank.
Had it in for around 2 months but started to get annoyed by the management and emissions lights on so I took it out.
I noticed slightly better MPG and the turbo spooled faster.

After taking it out I have a massive flat spot around 1800rpm so I'm putting it back in with an 8mm hole.

 

I blanked mine out on my a4 tdi.
Left it in circuit after stripping and cleaning everything but blanked the (now removed) recirculating pipe so no dirty exhaust gasses entered the intake and blanked the vac pipe so the butterfly didnt move. Run sweet as but dont remember any positive effects on mpg over what it should have been.

 

im a little confused on this, if you just blank it off, im guessing with just a bit of metal plate (could you make one up yourself?) what are you actually doing? increasing the emissions? i.e., could if fail the MoT?

also, why the need for the "hole" in it?

 

Pretty much. I bought a plate off eBay made for my engine out of 2mm aluminum.

It won't fail mot unless there is a light on the dash and most dervs aren't tested on emissions and only have a smoke test.

The hole is to stop the light from coming on on the dash

 

also, could anyone pop up some pics with normal and blanked off that they have done?

 

so there has to be a flow of air through the metal plate? how would to dash light/ecu know that? is there another bit you need to attach to the plate so that the light/sensor/something needs to pick upthe air flow?

 

There doesn't have to but the light will come on very quickly without one.
The egr valve has a sensor in it so when it gets no exhaust gases past it it knows and puts the light on.

 

had mine removed from my 130pd VW Bora with the Allard Kit and mapped out by Rtech, driven for 15k miles and no problem what so ever and still going strong