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[firemoth]

Hi. Considering egr blank on my 2.2dti. However I've never actually done one so seeking guidance please

[VXL V6]

Can't be done on a DTi (not possible to blank it if you look closely at the design). Not sure why you would want to anyway as the DTi requires an EGR to run properly.

[Magwheels]

Why do you think it won't run properly? Please explain.

I have been looking into removing the EGR and whilst you can get a blanking "plug" that fits the manifold it needs either a software tweak or an EGR cheater to make sure the light does not come on. The supplier was working on this when I last contacted them.

There seems very little info on these engines as nobody likes to mess with them in the Omega. The SAAB boys have had much fun with them but the motors have subtle differences especially to the EGR side of things.

Any info greatly appreciated.

[firemoth]

Egr synced to ECU?? Why must they do these things??

[Marks DTM Calib]

I recall there being two versions of EGR on these

One easy to 'disable' the other requiring a bit more work

[TheBoy]

IIRC, there is no EGR feedback, and EGR faults are detected by calculations on amount of air, speed, load etc


What are you hoping to gain, other than poor economy, by blanking EGR?

[Marks DTM Calib]

egr on a diesel will have little economy impact (it will slow warm up a bit  ) but will ensure the swirl flaps don't crudd up

[Magwheels]

Why would blanking the EGR off hurt economy? If anything economy would improve along with throttle response and most of all it would stop all the nasty hot filthy exhaust gases going back into the manifold and engine. The EGR is there for emissions alone as the manufacturers are required to get the car passed harder and harder emissions tests. As soon as I got my first 2.5td I cleaned the crud out of the intake manifold and blanked off the EGR (easy on the M51 lump) and it drove better with more go and mpg. When I had a look into the manifold some 8 years later when changing the alternator it was still nice and clean with just a light coating if oil. I must look into doing the dti again but have been a bit busy lately.

[TheBoy]

Diesels use a fair bit of EGR at cruising speeds to effectively reduce engine capacity.

[Magwheels]

Oh I see your thinking. I don't want less, I need MORE! If you have even driven one of these you probably know why 

In all honesty for what it is it doesn't go to bad and I do like the economy.... but if I could get more and stop the crud getting into the manifold then I would. As far as I understand the workings of an EGR it admits the exhaust gases on decelerating engine or high vacuum on the intake manifold so getting rid of it would only be a good thing apart from the emission's and the eml if that can't be switched off (which I think it can from in the ecu software). The less crud that goes into my engine the happier I will be especially with those dammed swirl flaps.

Every engine I used to mod I got rid of anything emission related and it only ran better.

[Marks DTM Calib]

No, on a diesel it uses max EGR at idle and light load, quickly removed when any boost etc is required.

Its very different to a petrol EGR setup, it does help the engine warm up faster which is a good thing.

But I agree, the soot is not good for the inlet manifold 

[Magwheels]

SOOO the best way to avoid soot in the intake is to keep it on boost, that sounds like it could be fun.

I must admit I never got into diesels when I was into tuning as I never ever thought I would own one....or a front wheel drive car either!

But times have moved on and I (almost) leave the engine pretty much standard now and only take it apart to fix it. I did start doing some research on the ins and outs of how they work but thought why bother, I'd rather play with the bikes than a smelly diesel.

I do still get the urge to tweak the car though hence the interest in the EGR and possible remapping of the old girl. I did look for info (general plumbing, vac pipework etc) on the dti engine as fitted to the Omega but it is hard to find whereas the M51 lump was easy.