WRONG LABELING OF ECM WRONG PROM/NO INJECTOR PULSE

THIS BULLETIN SUPERSEDES BULLETIN 83-I-3 (PONTIAC)... THE FIRST CONDITION CONCERNS ONLY SERVICE ECM'S IN WDDGM STOCK. THE TWO SERVICE UNITS INVOLVED ARE: 1225550, WHICH IS USED ON 5.0L DUEL EFI FIREBIRDS; AND 1225570, USED ON 2.5L EFI PHOENIX AND 6000. THE MISLABELING COULD CAUSE THE SINGLE INJECTOR ECM (1225570) TO BE INSTALLED INTO A DUEL INJECTOR VEHICLE... IF THIS HAPPENS NO TROUBLE CODES WILL BE SET. THE CAR WILL RUN POORLY BECAUSE ONLY ONE INJECTOR WILL BE OPERATING. THE CORRECT IDENTITY OF THE ECM CAN BE DETERMINED BY CHECKING THE MANUFACTURING CODE ON THE SIDE OF THE ECM. REFER TO FIGURE 1 (ILLUSTRATION) FOR AN EXAMPLE OF THE MANUFACTURING CODE. THE CORRECT INFORMATION FOR EACH SERVICE UNIT IS: SERVICE NO. MANUFACTURING CODE ENGINE APPLICATION 1225550 015 (FIRST 3 DIGITS) DUEL INJ. 5.0L V-8 1225570 144 " SINGLE " 2.5L L-4 THE SECOND INSTANCE OF MISLABELING CONCERNS 1983 ECM 1226100 BEING LABELED A 1982 1/2 ECM 1225610. THIS MISLABELING HAS OCCURED ONLY ON PRODUCTION UNITS AND N O T SERVICE UNITS. THERE WILL BE NO DRIVEABILITY CONDITIONS NOTICED. IN THE EVENT OF ECM REPLACE_ MENT, USE THE MANUFACTURING CODE FOR PROPER I.D. SERVICE NO. MANUFACTURING CODE ENGINE APPLICATION 1225610 743 (FIRST 3 DIGITS) 82 1/2 1.8 &2.5L 1226100 773 ( " ) 83 1.8 &2.5L

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