Engine - Wide Open Throttle Surge Above 45 MPH

90buick05

Model Year 1982

Bulletim No. 82-T-31

File in Group 60

Number 18

Date Mar. '82
SUJECT: Wide Open Throttle Surge


MODELS AFFECTED: 1982 Regals Equipped With Turbo Charged Engines (LC8)


Some 1982 Regals equipped with turbocharged engines may have a surge condition when under heavy acceleration at speeds above 45 mph. This may occur when the transmission converter clutch is engaged during wide open throttle. To correct this condition, new ECM PROM's are now being used in production vehicles.

If any owner should comment on subject condition, the applicable ECM Service PROM should be obtained from WDD GM and installed in ECM following instructions in this bulletin and Service Package.

ECM Service PROM for Federal Vehicle # 1225906.

ECM Service PROM for California Vehicle # 1225907.

ECM PROM INSTALLATION

1. Remove ECM from right kick pad.

2. Remove calibration PROM and install new PROM Included in Service Package. Installation instructions included in package.

3. After new PROM has been installed, it is important to use a felt pen to change the information on the ECM Label as follows:

^ Cross out "MR" and write in "ARW" (Federal)
Cross out "NH" and write in "ARX" (California)

^ Cross out part # 16017094 and write in part # 16025254
(Federal) Cross out part # 16017224 and write in part # 16025264 (California)

4. Perform System Performance Check. Refer to chart on page 6E-22 of the 1982 Chassis Service Manual. Correct any discrepancies found on System Performance Check using applicable chart in Service Manual.

5. Insert ECM in cover and reinstall in vehicle.