Have 97 altima with errors p0100 & p0325(*2)?

Been to the same shop 4 time for the same reasons. The car stalls when clutch is disengaged as well as hesitates and sputters with large loss of power in the lower rpm ranges(3000-0). Has had the tps changed, egr valve changed and gasket, the knock sensor, distributor, cap and rotor changed. Still the error code p0100 & p0325 show up and still has same problems. Any answers?