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EGR blanking

T

thinfourth

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Stonehaven
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Landrover 90
The wonderful exhaust gas recirculation valve brought to us by legislation.

A nasty device that takes exhaust gas a dumps it into the engine intake which is a really dumb idea.

On my landrover 300Tdi it was binned many years ago and i have it blanked and it improved many things and my intake manifold stays clean instead of gunking up.

Can i blank it on the accord or will the brain have a hissy fit?

The actual blanking is easy as will just machine a blanking plate its the brains that bother me as I don't have much knowledge of brains
 
Think you will run into problems bud.
 
On our cars the ECU calculates the EGR position, ie percentage open compared with the requested EGR% Blanking off completely isn't an option unless you can re write the software to map out EGR. I've read you can partially blank, but don't know any more about that.
 
So... I was going to share this with you guys in a few weeks but seeing as someone has brought the topic up... Elite have successfully created a map that Delete's the EGR valve on the ICTDI ;)

It's been installed and tested on a Civic out in Ireland for several weeks now. We haven't released it as we're working on successfully protecting our software to protect from theft.I'll be testing on my own car in the near future - apparantley it's good for a few extra bhp too ;)
 
that sounds interesting Fahad so the software just keeps the EGR shut then?

i've always thought EGR's as a stupid idea an engine works best on cold dense air so they put an EGR on so you pump hot gases in
 
i sometimesfeel you are out to wreck my marriage on purpose :lol:
 
I didnt want to post about this until Fahad said something. It'll be very interesting and hope it works. Will it combine with a remap?
 
Yea, I agree EGR is a stupid thing although I dont know the ins and outs of how emissions work, the EGR system is all about reducing the harmful gases and all that.
 
balls to that!
 
Its all to complex for me but if it works ill give it a go
 
Interesting development there by Elite, just out of curiosity is that just for the pre-facelift or both?

Fahad, it will be interesting to see the longer term results.

As regards to blanking off / disabling personally I'm in the leave it alone camp, there is another thread on the subject here

EGR Blanking
 
It's for both vac and electronically operated EGR and don't ask me how it works (trade secret) and I actually don't know in great detail. I trust their work and they don't really do things by halves so I'll give it a go.

My software has arrived this morning so I'll give it a whirl on my car today... ah the joys of being an engine tuner :lol:
 
Now while i appreciate you have one down the route of chips i prefer beans.

Make a blanking plate from the end of a baked bean can

If you do this does the ECU get its knickers in a twist as the EGR can still move just it don't do anything
 
I've a few questions about the EGR valve.

Does the EGR valve only work when the engine is cold or all the time?

If bypassing the EGR valve when the engine is cold would it take longer for the engine to heat up as the intake air will be cooler?

If bypassing the EGR valve when the engine is hot would the engine run hotter as there is a greater/ cleaner combustion in the chamber?

Will bypassing the EGR cause the car to fail an MOT?

Thanks
Matt
 
I would imagine the EGR on the diesel is a closed loop system. I.e. there are sensors after the EGR valve that are looking for certain values? If you just blank it off the ECU is not going to like it because no matter what it does its not getting the required values?

Will this produced any more smoke / soot?
 
Well I guess I'll find out soon enough.

Been using the new mod file since yesterday, seems good so far. Will keep you all posted. Can't anwer your questions as I don't actually know and I'd be guessing, but I am being ***ured that it's not simply an EGR switch off - the software is re-written to compensate for any values that have an inter-dependancy on the EGR valve.

It's a little bit like doing a DPF Delete on a more modern engine..
 
Seems a little stronger, but nothing substantial to write home about. Haven't had a proper chance to open it up a bit yet.
 
F6HAD said:
Seems a little stronger, but nothing substantial to write home about. Haven't had a proper chance to open it up a bit yet.
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Keep us informed Fahad.Just a question mate what are the benefits of this if any.
 
A bit more punch and a few less things to go wrong by all accounts.
 
There isn't an emissions test for the diesel MoT, just the smoke test, and this won't effect that.
 
My old A6 had the egr switched off (was something you could do with va.gcom). I didnt notice any extra performance, but i did gain 1 or 2 mpg by doing it. Re emissions, it will increase the Nox emissions, but seeing as testing nox aint part of the mot, its all good
 
I posted this in the previous EGR Blanking thread but putting it here also as it answers a few questions, I've updated it a little

I'm posting a couple of articles explaining EGR's, how they work and purpose etc .

Understanding EGR Systems

EGR Systems: Operation and Diagnosis

The biggest problem with blanking the EGR specifically on the I-CTDI, is that fueling is specifically tailored dependent on temperatures, air pressures and flows, the ECU takes into account these and releases a specific amount of fuel to maintain temperatures within the block and ensure optimal performance, via the MAF and MAP sensor, which both contain temperature sensors, together with other adjustments to the IMRC valve to alter the swirl ratio. This would all need to be taken into account when re-writing or erasing any maps, together with addressing any emissions control maps that may put the car into limp mode as the OBD II Emission standards have been breached.


As the EGR introduces exhaust gases to reduce the overall combustion temperature, then it would follow that with the EGR disabled the overall combustion temperatures would increase and in the article posted above it mentions a couple 100 degrees, which could have a cyclic effect causing the engine to overheat. The block is aluminum and has been designed to work in a certain temperature range, given the use of the EGR, I'm also not sure what effect this will have on the valve and seats as they will also be exposed to far higher temperatures than designed to operate in, not to mention the effect on the exhaust manifold, dependent on which version you have. Of course with the increased temperature the cooling system has to cope harder, which again will affect overall fueling.

I personally think it is too tightly designed into the whole running of the engine to be removed without serious issues, plus is it worth it, there are a few DIY's showing you how easy it is to clean it.

There are also plenty of threads showing how one slight thing such as fuel filter, IMRC solenoid vac leaks etc can have such a dramatic effect on the car.

On the other hand I have full faith in Elite to be able to do the maps and clearly it seems to be working well on the Civic and this would be the only way of possibly achieving it rather than sticking a piece of blanking material in the port, which incidentally would also need to be able to withstand the increased temperatures being subjected to it in exhaust gas. however it is still early days, I would be interested to know how the car fairs after say a year or so.

Clearly I am focusing on the negative points here, but it is the negative points that generally upset us when they happen, all I am really trying to say is, is it really worth all the risks, just to avoid cleaning it? (anxiously awaits response :unsure: )
 
Carl, what you are saying in principle is correct. But as I said earlier, this isn't a simple 'switch off'.

Bear in mind the tuner has control over everything including injection, fuel pressure, boost & limiters, requested air flow, egt temp limiters, torque limiters, AFR etc and this isn't something conjured up overnight either - I've known about it for some time but was asked not to say anything until they were happy with it.
 
F6HAD said:
Carl, what you are saying in principle is correct. But as I said earlier, this isn't a simple 'switch off'.

Bear in mind the tuner has control over everything including injection, fuel pressure, boost & limiters, requested air flow, egt temp limiters, torque limiters, AFR etc and this isn't something conjured up overnight either - I've known about it for some time but was asked not to say anything until they were happy with it.
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Of course as you say it will not be just a simple switch off i'm sure that there has been many scratched heads and late nights at Elite over this issue and as said earlier I have full faith in them being able to do it and of course they presumably still have some further testing to do, before releasing on the wider public.

in my post earlier I'm trying to point out that it is a very difficult task to get rid of something that has been so interlinked in the design of the engine and that it shouldn't be compared with some simplier diesel engines, where simply sticking in a blanking plate will suffice, especially when it is relatively easy to clean the EGR on the i-ctdi.
 
Yup agreed with you totally there mate.
 
I am really interested Faddy, Always wanted to disable the ****** :)
Keep us informed mate, dan
 
Pepster said:
Faddy you or elite have the AFR reading from a stock Diesel across the rev range? and compare that with an elite remaps. It would be interesting to see how the fuelling has been done to achive that increased BHP?
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I don't personally mate, but we wouldn't share it in public anyway.

Had the chance to take it on a long trip finally today, definitely pulls stronger - not as as strong as the stage 2 but somehow stronger than I'm used to. I had my brother follow me yesterday in his Golf (and when he could keep up ;) ) he said it did smoke a little more when I was giving it full throttle... but I was told to expect this.

I'm gonna leave it on for now and see how it goes over the next few k miles..

Also not driven it at night yet so will check to see what kind of a cloud I'm leaving behind :D
 
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