Code P0171, rough idle, shuts off at stoplights?

Replaced MAF with a Denso unit, did not correct the problem. Cleaned the throttle body with throttle body cleaner and a plastic brush, no change.

Hooked a smoke machine to the brake booster line and got some puzzling results. First there was a pinhole in the intake resonator (black plastic reservoir under breather tube), since this is post MAF this definitely needs corrected.

What I am unsure of is why there was smoke literally pouring out of the EGR regulator as well as some smoke coming from the bottom of the EGR itself (through the ports). I'm unsure if there is something specific needed on this car to either route around the EGR, or force it closed prior to doing the smoke test. It seems unlikely that both of those components are faulty. Seems like it should be naturally closed. Smoke test was performed without any circuits energized.

Another curious thing about this vehicle is that it puffs air rather forcefully from the oil fill if the oil fill cap is removed. I haven't done a PCV valve because they're quite difficult to get to on this vehicle. Could this forceful air be making its way into the intake and causing a lean condition?