Sometimes my car has power, sometimes it doesn't. It runs a little rough when its cold too and feels like a lean jerk at real low rpms. I got a code a couple months ago for lean on bank 1 and 2 also but hasn't come back.

Could the egr be stuck open?

 

Any ideas?

 

Could be a lot of things. Fuel system? I'd start by changing the fuel filter. You could try some Sea Foam.

 

Where is the fuel filter?