Quote:
Originally Posted by mwebb
EGR reduces combustion pressure and
thereby reduces Combustion temperature so warm up time will NOT be reduced if EGR is used when cold.
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On the VW TDI is does help warm up times. The Exhaust Gas goes through a stainless steel EGR cooler which is tied into the coolant loop. As the exhaust gas is cooled it heats the coolant flow.
Quote:
Originally Posted by mwebb
EGR does not get cut off when the system is at normal operating temperature because the primary reason there is EGR
is to reduce NOX emissions
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Agreed. Unless it has been modified (tuned).