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Published on 06-03-2010 06:15 PM
OK, now for a somewhat fun article: cleaning/testing your Exhaust Gas Recirculation valve, or EGR.
Let's start with some engine theory. The EGR exists primarily to reduce NoX emissions by recirculating exhaust back into the intake system, where it displaces oxygen, one of the key components of combustion (thereby lowering the peak temps which prevents nitrogen and oxygen from combining). There are also a few other benefits that come from EGR usage; preventing burnt exhaust valves through lowering combustion chamber temps being a major one and a debatable increase in fuel economy
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