As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH ENGINES WERE SLOW TO START AND DURING THE START AFT CABIN GOT HEAVY EXHAUST ODORS. FUMES WERE IN THE CABIN UNTIL THE PACKS WERE TURNED ON. FOUND SLIGHT ODOR WHILE OPERATING APU. NO FUMES NOTED WITH APU SHUT DOWN AND AIR STARTERS USED. FWD APU TO MCO AND PLACARD.