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Old 05-20-2010, 01:03 AM   #10 (permalink)
mwebb
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Join Date: Jul 2009
Location: New York
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no nickname , it's just a car - '04 volkswagen golf tdi
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EGR is good for everything - do not delete it

somehow this subject keeps being reposted
somebody gets it in their mind that removing the EGR system helps the engine run better and somehow magically increases power output and improves fuel economy

all of that is pure blarney -

EGR does not function at idle or WOT - and does not affect maximum power output .
EGR does function at part load or cruise .

the Primary function of EGR is to add INert exhaust gases to combustion to reduce combustion temperature and by so doing
reduce the formation of the pollutant NOX

EGR improves fuel economy by reducing suction throttling loss and reducing engine compression and reducing engine displacement
BY DILUTING THE AIR FUEL MIXTURE IN THE COMBUSTION CHAMBER WITH INERT EXHAUST GASES
while it is active

deleting EGR is going to cause your system to pollute more and it will reduce FE , deleting EGR will have no affect on maximum power available.

and on a 1996 or newer car ;
doing anything to interfere with EGR function is "tampering " with the OBD2 system and a violation of federal law .

bottom line ;
if you do not know EGR theory ....
do not frak with your EGR unless you need to clean out the passages to IMPROVE / INCREASE EGR flow .

Last edited by mwebb; 05-20-2010 at 01:06 AM.. Reason: SPELLING
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