As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED THAT DURING CLIMBOUT THE ENGINE BEGAN RUNNING ROUGH, AT WHICH TIME HE RETURNED TO THE AIRPORT (PHX). TECHNICIAN COULD NOT DUPLICATE THE MALFUNCTION ON A GROUND RUN UP. THE FUEL INJECTOR NOZZLES WERE REMOVED & INSPECTED AND THE NR 2 INJECTOR WAS FOUND TO BE PLUGGED. THE INJECTOR NOZZLES WERE CLEANED & REINSTALLED. THE ENGINE RUNUP WAS NORMAL AND SMOOTH, AND THE AIRCRAFT WAS FLOWN BACK TO PHOENIX.