2002 legacy heavy bogging

On idle, engine seams to completely want to stale because of boggs. also while driving down highway it seems like when i need to let go gas to reduce speed , when its time to finally give gas, i get wat i call " gas pedal kicks" seems to be a misfire p301 p302 p303 p304? I get the code p0172 too lean banc 1 (i know its the 02 sensor and have purchased one) after reading some older forums it seems like it wont make a difference? Im just looking for someone who had the same problem in the past to maybe shorten the spending spree i have changes plugs, wires, the coil, fuel filter and air filter no change, i also get po447 evap system valve open