Busy doing some routine maintenance before my next big trip in August.
While my car was at mitsu dealers, I asked them to check EGR. They confirmed it was completely blocked, and cleaned it again. I found this strange as I had it cleaned 30k kms ago... (after I went down to the coast and experienced some rough/smooth/rough/smooth engine running at around 2000rpm).
So my question is: is this normal for the EGR to block up so quickly? I probably had 6 tanks of 500ppm in that entire time (with some S20) - the rest was all with 50ppm (and 10ppm more recently).
Should I consider deleting the EGR? (i.e. does this not affect long term life of engine/turbo/etc.?)
I don't think there is a definitive answer out on this one. Many opinions though.
I have never had my EGR blocked off in the 300000km that I have owned my 3.2Did, but I did have an engine failure just recently. Is it linked to the EGR? Who knows?
My question has always been. If the EGR is gunked up, will that not lead to the same result as actually blocking it off? So maybe I have a blocked off EGR in any case but just a natural one?!
CATS
I have never had my EGR blocked off in the 300000km that I have owned my 3.2Did, but I did have an engine failure just recently. Is it linked to the EGR? Who knows?
My question has always been. If the EGR is gunked up, will that not lead to the same result as actually blocking it off? So maybe I have a blocked off EGR in any case but just a natural one?!
CATS
2009 Pajero 3.2 DiDc Lwb GLS (Gen4) - Casper (Starting to grow on me)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
2001 Pajero 3.2 DiD Lwb GLS Manual (Gen3) - Snoopy (SOLD but not forgotten)
2008 Pajero 3.2 DiDc Lwb GLS Auto (Gen4) - Silvester (SOLD)
I blocked mine off with no negative consequences for about two years now. The problem is the EGR (R for recirculation) is a tube with a valve inline which is controlled by the electronics. By opening the valve it will allow some exhaust gasses to recirculate back into the clean air tube from the turbo only under very light load conditions. The reason for this Is to improve the exhaust gas quality a little to "save the planet". In my mind it is hardly worth the risks involved.
Now when the ERR system clogs up around the seat of this valve, the valve is unable to close properly. So now it can happen that you have EGR activity at all speeds and all loads. Not GOOD! If you block it off it will never recirculate poor quality exhaust gas into the fresh air inlet. You are loosing nothing by doing that really.
EGR (exhaust gas) coming into the manifold also often block the tiny holes of sensors that screw into the manifold.
Now when the ERR system clogs up around the seat of this valve, the valve is unable to close properly. So now it can happen that you have EGR activity at all speeds and all loads. Not GOOD! If you block it off it will never recirculate poor quality exhaust gas into the fresh air inlet. You are loosing nothing by doing that really.
EGR (exhaust gas) coming into the manifold also often block the tiny holes of sensors that screw into the manifold.
Willie from Jo'burg
White Gen 3 SWB Pajero 3.2 DID
White Gen 3 SWB Pajero 3.2 DID
To answer this question:
I would imagine that the more soot you have in your exhaust gas the quicker the EGR will clog. Soot comes amongst other things such as poor quality diesel, also from burnt oil that bypasses the rings and signifies engine wear. Does your car use oil? If not you're OK.So my question is: is this normal for the EGR to block up so quickly?
Willie from Jo'burg
White Gen 3 SWB Pajero 3.2 DID
White Gen 3 SWB Pajero 3.2 DID
Bigwill,
One question: In your opinion will blocking the EGR on the 3,8 engine cause any problems? A fairly knowledgeable person told me that by blocking the EGR one can gain some power without any adverse effects.
Cloyd.
One question: In your opinion will blocking the EGR on the 3,8 engine cause any problems? A fairly knowledgeable person told me that by blocking the EGR one can gain some power without any adverse effects.
Cloyd.
Hmm, how much is bad? On my last 10k between services it went from fully to about halfway between the two indicators. Would you consider that "using oil"?
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Karl
Cloyd's question:
Maskerman's comment:
No, I cannot see how it can be harmful to the engine. The power gain I believe will be minimal, because the logic of these systems avoid circulation when the power demand increases and also during idling. Chances are better to improve fuel efficiency when driving with a light right foot. Having said that you would not generally find EGR systems on modified racing engines.One question: In your opinion will blocking the EGR on the 3,8 engine cause any problems? A fairly knowledgeable person told me that by blocking the EGR one can gain some power without any adverse effects.
Maskerman's comment:
No definitely not. Lets look elsewhere: The rough / smooth / rough /smooth engine running may perhaps be the cause rather than the symptom of clogging up. It sounds like an air/fuel ratio problem occurring at times which will also cause black smoke albeit only at certain times. Sorry, my best try!Hmm, how much is bad? On my last 10k between services it went from fully to about halfway between the two indicators. Would you consider that "using oil"?
Willie from Jo'burg
White Gen 3 SWB Pajero 3.2 DID
White Gen 3 SWB Pajero 3.2 DID
What about the 2SO? I imagine the ratio is much less, but when you look inside a 2 stroke engine's exhaust, you see plenty reasons to block up anything
I would simply blank it out. EGR is a patch added to engines in order to reduce emissions, it's not like it's part of the design of an engine as a necessary component. That's my opinion at least
I would simply blank it out. EGR is a patch added to engines in order to reduce emissions, it's not like it's part of the design of an engine as a necessary component. That's my opinion at least
Affiliate Member
EGR working as it should an be beneficial in fuel economy but that is a rare thing.
Blocking off an EGR does not add power as the EGR is not utilised at full throttle.
It can add power mid range as you have only fresh air in the combustion chamber.
EGR systems tend to block intake manifolds with gunk that could starve the engine of air making it run rich (HIGH EGT)
It is not actually the EGR that blocks the system but a combinatiuon of EGR and PCV oil vapours.
So, if you have an electronic EGR system that will through a CEL when you block it, install a catch can instead.
Blocking off an EGR does not add power as the EGR is not utilised at full throttle.
It can add power mid range as you have only fresh air in the combustion chamber.
EGR systems tend to block intake manifolds with gunk that could starve the engine of air making it run rich (HIGH EGT)
It is not actually the EGR that blocks the system but a combinatiuon of EGR and PCV oil vapours.
So, if you have an electronic EGR system that will through a CEL when you block it, install a catch can instead.
The car does not smoke at all ... Only at night you can see there is some gas coming from the exhaust when another cars light shines through it.
Wonder if mitspro would install a catch can...
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Wonder if mitspro would install a catch can...
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Karl