As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL INJECTOR WAS DETERMINED TO BE EXCESSIVELY RICH. IAW MFG CHECKLIST MAG CHECK IS AT 2200 RPM. MIXTURE IS LEANED TO PEAK THEN THROTTLE RETARDED TO 2200 RPM. THIS RISE SHOULD BE 40-50 RPM. THIS WAS AROUND 200 RPM. REPAIR STATION FOUND UNIT RICH AT BOTTOM.