So, bank 1 lean and misfires on cyl 1,2,4.
Have you checked fuel pressure at the rail?
Edit:
-From the resource-
P1136 - Audi - Long term fuel trim, idling, Bank 1 - system too lean
Cause: Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak
P1128 - Audi - Long term fuel trim, entire speed/load range, Bank 1 - system too lean
Cause: Fuel pressure/pump, injector(s), intake/ exhaust leak, AIR system, hose leak