http://london-lez.org/nox-emission/how-will-removing-my-egr-affect-my-nox-emissions Tue, 22 May 2012 05:41:29 +0000 http://wordpress.org/?v=2.7 hourly 1 http://london-lez.org/nox-emission/how-will-removing-my-egr-affect-my-nox-emissions/comment-page-1#comment-3465 Stu Tue, 29 Sep 2009 01:34:59 +0000 http://london-lez.org/nox-emission/how-will-removing-my-egr-affect-my-nox-emissions#comment-3465 Typically you will set off the check engine light when you mess with the EGR system (the flow is usually monitored). That's fine if you don't have inspections, but I am guessing you do. I'm not sure about the VW system, but typically the passageway to the EGR gets plugged up and changing the EGR valve does nothing to fix the problem. There are flexible drill bits available now to clean out the EGR passageways to correct the plugging problem (or at least fix it for another 80K miles). The NOX would go up as well as the combustion temperatures, at least on a gasoline engine. I don't believe there will be any negative effect on mileage with the removal of the EGR, unless you had unburned fuel in the exhaust - which would be another problem.<br><b>References : </b><br> Typically you will set off the check engine light when you mess with the EGR system (the flow is usually monitored). That’s fine if you don’t have inspections, but I am guessing you do. I’m not sure about the VW system, but typically the passageway to the EGR gets plugged up and changing the EGR valve does nothing to fix the problem. There are flexible drill bits available now to clean out the EGR passageways to correct the plugging problem (or at least fix it for another 80K miles).
The NOX would go up as well as the combustion temperatures, at least on a gasoline engine.
I don’t believe there will be any negative effect on mileage with the removal of the EGR, unless you had unburned fuel in the exhaust - which would be another problem.
References :

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