Update the Hints and Tips section of our 370z manual with the importance of carrying our ECU Reset and Idle Learning.
Section 6 of 370z manual, maybe insert at 6.1.5 and tweak both accordingly.
Question: Unstable Idle and P0300 misfire codes This can occur if the throttles are not correctly balanced. The engine idle can feel rough and be unstable, during driving you may experience P0300 for random cylinder misfire, you may also see the Fuel Trim Short Term are unbalanced. This can be fixed using the ECM Tools feature call Idle Learning. First make an ECU Reset Next choose Idle Learning This balances the throttle against airflow for each bank and improves Idle stability. Ensure the ingine is up to temp, the doors and bonnet are shut and that Intake Air Temp isnt too high