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Technical egr blanking off

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Technical egr blanking off

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anyone blanked the egr off on a 3l 160 mulitjet
I put a plate in mine and it started to hunt on tick over
 
The rubber tube runs from the vacuum control valve in front of you as you open the bonnet.

arrowed is one of the two pipes at the valve, one is the vacuum in and the other goes to the EGR, plus there is a power cable for the valve.

This is a borrowed picture from rayc.
 

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some say it gives you more power and better mpg
but for me is stops all that black gunk in the manifold and engine
and they do gunk up from time to time and get a drop in power
 
We used to do this in the Toyota Estima owners club. The benefits are lower intake temp & cleaner intake air = better burn = better power / MPG.
They are fitted to lower NOX emissions that some countries are very strict about , we don't test for them here. Removing / blanking the EGR should reduce the emissions we test for.
Not sure why yours would hunt with the valve removed though.
 
Most people do it because the crap sent round from the exhaust to the inlet (via the EGR) clogs up the inlet tract and causes power loss, lower mpg and eventualy a need to replace the EGR and clean the inlet manifold.

The effect of this can be seen on rolopolo recent picture of his throttle valve, the carbon build up is because of the EGR system, although this was not the cause of his problem.

I have a diesel 2.0 x-type this had a new EGR at about 70k after showing lots of smoke on accelerating and very poor mpg. This now has a blanking plate and has no more smoke and improved mpg. It now has 146k on it.

If your EGR is vacuum operated only then you can blank it or stop the vacuum getting to it. If on the other hand it is electronically controlled or has sensors in it you cannot stop it working or fully blank it as it will throw up an error.

You are more likely to get EGR problems with a motor not worked very hard like a motor home as the EGR is only open on low throttle demands so put your foot down and it closes. Plod around all day at low revs and a light right foot and it will be open a lot of the time sending the exhaust crap back around to the inlet.

Mike
 
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taffybloke said:
This is a picture of a very clogged inlet manifold.
Click to expand...

I have egr opening reduced on one car and blocked in another but to be fair when its that oily its probably the pcv putting oil in the intake that traps the soot. Also bear in mind that egr reduces egt so blocking it on a hot running engine can lead to head damage, blowing manifolds etc. It not a one size fits all solution.
 
I made a blanking plate and fitted it started it up and it ran fine let it running and it started to hunt gave it a rev up and it was fine for 2 or 3 mins than started to hunt I did not drive it up the road as its a motorhome and I had to get it out and then park it up as its in storage so I took it out as I was off to Scotland in the next day or 2 on a 1000 mile round trip and didn't want it to play up
someone said I should have put a small 8mm hole in the plate but did not try that
 
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I'm not sure what to do for the best given conflicting posts.
In your opinion MIke? would I be better following your lead given the same engine. motorhome driven generally at 60 mph or even slower with 45k miles clocked. I'm not going to come back and bite your arse for your advice at a later date (y)
 
Techno100 said:
I'm not sure what to do for the best given conflicting posts.
In your opinion MIke? would I be better following your lead given the same engine. motorhome driven generally at 60 mph or even slower with 45k miles clocked. I'm not going to come back and bite your arse for your advice at a later date (y)
Click to expand...


Techno100. Sorry if this is not of much help but I am not sure I am going to leave it blocked.

I decided to just block the vacuum as it can easily be reversed, which I may do to see the effect on my MPG as it seems to have dropped a little since I blocked it, this may be due to my starting issues as I did not shut it off if it was parked for a short time. I am not having any problems with it so far apart from this. My van did 3 years and 100k as a working van before it was converted.

It came to me with a new EGR fitted so it seemed worth disabling. when I removed the throttle valve to change the glowplugs I noticed that the inlet manifold was fairly clear.

You seem to be more than capable of replacing the EGR and cleaning the manifold after looking at the projects you have detailed on motorhomefun and I would, If you have not got them, get the cables and the paid version of multiecuscan so you can keep an eye on your motor.

Mike
 
Thanks Mike
I have a OBDII bluetooth scanner and Torque pro app which I may start using on journeys.
If I remove the throttle valve will it need a new gasket ? I could do with giving it a good clean since I stopped the water ingress.
 
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I didn't know you could get a egr blanking kit but this looks ok may give it a try my 08 motorhome only has 10000 on the clock its a tag axle and I get around 21mpg
 
I took my throttle valve off this morning Mike. What a struggle that is!
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An hour of TLC
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