Originally Posted by 06RangerXLT
not sure how ya gained mpg, its purpose is to recirculate unburned fumes.
this is incorrect, the EGR's job is to recirculate exhaust gases(EGR=exhaust gas recirculation). this in theory is supposed to cool down the combustion chamber as these gases take up available space in the intake manifold and reduce the amount of air in the chamber. Less air in the combustion chamber means that the fuel mixture richens and cools the chamber. It is a good theory, but in reality does not function as intended.
this is what the guys do on my mazda boards. Absolutely love this mod
I've been running this way for over a year now.
You also have the option as others have suggest to simply turn the valve off with a tuner.