EGR and what it really does:
egr recycles waste exhaust gas puts it back into the cylinders (as much as 10% of the total air intake of the engine on some engines) its NOT used to "reburn" unburned gasses. its used to take up space in the cylinders thus using less fuel. it also cools down the cyl temps to reduce NOx emissions. EGR does not function at WOT. it doesnt help performance at all. it DOES increase gas milage and reduce emissions. thats all its designed to do. but what do i know....im in class now and taking the test for my PA emissions license feb 1st.....
