DRIVEABILITY IMPROVEMENT UPDATE CERTAIN EMISSON DEVICES

TO IMPROVE DRIVEABILITY CHARACTERISTICS, A PRODUCTION RUNNING CHANGE HAS BEEN INCORPORATED ON 1982 CAVALIERS APPROXIMATELY JULY 20, 1981. THE CHANGES INVOLVE NEW ELECTRONIC FUEL CONTROL CALIBRATION AND REVISIONS TO THE EGR, TVS, AIR MANAGEMENT VALVES, AND CARB BASE IDLE SPEEDS. THESE PRODUCTION CHANGES ARE INTENDED TO IMPROVE SUCH DRIVEABILITY CHARACTERISTICS AS TIP IN HESITATION, LEVEL ROAD SURGE, WEAK DRIVEAWAY AFTER COLD START AND UNDER CERTAIN CONDITIONS, ENGINE STALLING (WITH CLUTCH DISENGAGED DURING COAST DOWN). SOME EARLY J-CARS MAY EXHIBIT ONE OR MORE OF THESE CONDITIONS AND MAY BE CORRECTED BY PERFORMING THE SERVICE IDENTIFIED IN THE CHART ON PAGES 2 AND 3 OF THIS BULLETIN. WHEN USING THE CHART, DETERMINE THE AUTOMATIC TRANSAXLE MODEL BY REFERRING TO THE STAMPED METAL TAG LOCATED ADJACENT TO THE SHIFTER SHAFT ON THE TRANSAXLE. IT IS ESSENTIAL THAT THE CORRECT VEHICLE EQUIPMENT COMBINATION BE DETERMINED AND THAT ALL THE SERVICE ACTIONS INDENTIFIED IN THE CHART BE PERFORMED TO ASSURE THAT THE VEHICLE REMAINS IN A CERTIFIED CONFIGURATION. ** REFER TO PAPER BULLETIN FOR CHARTS & DETAIL **

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.