1982 J2000 DRIVEABILITY (CALIFORNIA ONLY)

To improve driveability characteristics, a production running change will be incorporated on 1982 J2000 vehicles approximately September 15, 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 drivieaway after cold start and under certain conditions, engine stalling (with clutch disengaged during coastdown).

Some early J2000 cars may exhibit one or more of these conditions and may be corrected by performing the service identified in the following chart.

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 identified in the chart be performed to assure that the vehicle remains in a certified configuration.

NOTE: It is essential that only the specified part numbers be used. PROM calibrations vary for each engine transmission combination and should not be interchanged. The PROM Code is printed on the PROM body.

WDDGM will notify dealers when air management valve, part number 17082701, becomes available.

VEHICLES EQUIPMENT CONDITION ACTION REQUIRED TRANSAXLE ECM A/C** (REPLACE OR *Adjust)

3.18 AUTO. 16018071 N LEVEL ROAD SURGE EGR VALVE P/N 17068212 CI 16011711 B " 16018131 B "

3.18 AUTO 16018071 N TIP-IN HESITATION *CARBURETOR P/N 17081701 CI AND/OR LOW ADJUST BASE IDLE WITH ISC SPEED PERFORMANCE RETRACTED TO 725 RPM EGR P/N 17068212 PROM P/N 1225387 (33 AMJ) 16011711 B EGR P/N 17068212 PROM P/N 1225387 (33 AMJ) 16018131 B EGR P/N 17068212 PROM P/N 1225388(3397 AMK)

2.84 AUTO 16018061 Y TIP-IN HESITATION AIR MANAGEMENT VALVE CI AND/OR LOW P/N 17082700 SPEED PERFORMANCE PROM P/N 1225374(3214 ALZ) 16018121 N AIR MANAGEMENT VALVE P/N 17082700 PROM P/N 1225375(3222 AMA) 16018241 Y AIR MANAGEMENT VALVE P/N 17082700 PROM P/N 1225378(3238 AMD) 16018171 N AIR MANAGEMENT VALVE P/N 17082700 PROM P/N 1225379(3276 AMT)

MANUAL 16018161 Y SEVERE IDLE EGR TVS P/N 373510 DEGRADATION IN PROM P/N 1225376(3227 AMB) COASTDOWN Y ENGINE RPM 1100-1800 AIR MANAGEMENT VALVE P/N 17082701 16018211 EGR TVS P/N 373510 PROM P/N 1225380 (3374 AMF) AIR MANAGEMENT VALVE P/N 17082701

MANUAL 16018161 Y WEAK DRIVE AWAY EGR TVS P/N 373510 PROM P/N 1225376(3227 AMB) AIR MANAGEMENT VALVE P/N 17082701 16018201 N EGR TVS P/N 373510 PROM P/N 1225377(3233 AMC) AIR MANAGEMENT VALVE P/N 17082701 16018211 Y EGR TVS P/N 373510 PROM P/N 1225380(3374 AMF) AIR MANAGEMENT VALVE P/N 17082701 16018251 N EGR TVS P/N 373510 PROM P/N 1225385(3375 AMU) AIR MANAGEMENT VALVE P/N 17082701

A/C** California vehicles can be identified Y = Yes by the Vehicle Emission Control N = No (Tune-Up) Label Code AZB or CJB. B = Both A/C & Non A/C

The component replacement procedures may be found in the 1982 J2000 Service Manual as follows:

PROM - Page 6E-52 & 53 Air Management Valve - Page 6E-57 EGR Valve - Page 6E-45 EGR TVS - Page 6E-47

Use applicable labor operation.

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.