egr dramatically reduces fuel ecnomy actually causing more fuel to be used , hence not really that green. better to just have pure def system and treat the exhaust gasses for nox
not accurte insite is needed for install.. calibration comes after... any amount slow moveing acuation means low boost .. useually turbo.. not accuator ... they do come seperate.. dont let your parts guy screw you..insite is needed for reasemble though.. egr cooler failure suspect for turbo and or eger valve.. .. high low coolant codes dead give away..