PHANTOM STALLS UNDER LOW ENGINE RPM AND HIGH LOADS

REVISION: 09/16/96 IVS INVL 1 2 3 7

THIS BULLETIN HAS BEEN REVISED TO INCLUDE NEW FUEL INJECTORS, PROGRAMMABLE CALIBRATION AND ARTWORK. PLEASE DISCARD CORPORATE BULLETIN 67-65-21 (SECTION 6E - ENGINE FUEL & EMISSION). ----------------------------------------------------------------------

SUBJECT: PHANTOM STALLS UNDER LOW ENGINE RPM AND HIGH LOADS, EXTENDED CRANK TIME ON HOT RESTARTS (NEW FLASH PROM AND FUEL INJECTORS)

MODELS: 1996 CHEVROLET LUMINA 1996 OLDSMOBILE CUTLASS SUPREME 1996 PONTIAC GRAND PRIX WITH 3.4L TWIN DOHC V6 ENGINE (VIN X-RPO LQ1)

CONDITION:

SOME OWNERS MAY COMMENT THAT THE ENGINE STALLS UNDER A HIGH LOAD AND LOW ENGINE RPM CONDITION TYPICALLY DURING A PARKING LOT MANEUVER. ADDITIONALLY, SOME OWNERS MAY COMMENT ABOUT EXTENDED CRANKING TIME ON A RESTART AFTER A HOT SOAK.

CORRECTION:

A NEW PCM (POWERTRAIN CONTROL MODULE) CALIBRATION HAS BEEN RELEASED TO ADDRESS THE ABOVE CONDITIONS. ALONG WITH REPROGRAMMING THE PCM IT WILL BE NECESSARY TO SECURE THE VACUUM LINES AT THE THROTTLE BODY WITH A TIE STRAP (FIGURES 1 AND 2). AFTER INSTALLING THE TIE STRAPS, CUT OFF THE EXCESS TIE STRAP MATERIAL.

IF, AFTER THE NEW FLASH PROM HAS BEEN INSTALLED AND THE VEHICLE STILL EXHIBITS CRANK TIMES IN EXCESS OF 4 SECONDS AFTER A MINIMUM HOT SOAK OF 45 MINUTES, THEN REPLACE THE FUEL INJECTORS WITH P/N 17113317.

PARTS INFORMATION THE VACUUM HOSE TIE STRAP AND FUEL INJECTORS ARE EXPECTED TO BE AVAILABLE FROM GMSPO ON SEPTEMBER 30, 1996.

P/N QTY DESCRIPTION

11501906 2 TIE STRAP

17113317 6 SFI FUEL INJECTOR

THE FOLLOWING CALIBRATION NUMBERS ARE AVAILABLE FROM THE GM SERVICE TECHNOLOGY GROUP STARTING WITH 1996 CD #16. THE CALIBRATION NUMBERS ARE AS FOLLOWS:

CALIBRATION EMISSIONS NUMBER

16246074 NATIONWIDE

16246064 UNLEADED EXPORT W/OUT OBDII

IMPORTANT: DO NOT ATTEMPT TO ORDER THE CALIBRATION NUMBERS FROM GMSPO. THE CALIBRATIONS ARE PROGRAMMED INTO THE VEHICLE'S POWERTRAIN CONTROL MODULE VIA A TECHLINE TOOL DEVICE.

WARRANTY INFORMATION FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR DESCRIPTION LABOR TIME CODE

J6355 PROM, REPROGRAMMING ON-CAR USE PUBLISHED LABOR OPERATION TIME.

J6352 PROM, REPROGRAMMING OFF-CAR USE PUBLISHED LABOR OPERATION TIME.

J6980 VACUUM HOSE, REPAIR OR USE PUBLISHED LABOR REPLACE OPERATION TIME.

J5650 INJECTOR, FUEL - REPLACE USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 2 ATTACHMENTS: 0

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1996. GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.