Grand AM L4-138 2.3L VIN A MFI (1992)
PROM - Programmable Read Only Memory: Technical Service Bulletins
PROM - Hesitation, Sag/Chuggle On Accel During Warm-Up
Group Ref: Engine Fuel & Emission
Bulletin No. 316509
Date: February, 1994
SUBJECT:
HESITATION, SAG OR CHUGGLE ON ACCELERATION DURING WARM-UP (DIAGNOSE INSTALL NEW EPROM)
MODELS:
1990-91 CHEVROLET BERETTA
(WITH 2.3L ENGINE - VIN A - RPO LG0)
1990-91 OLDSMOBILE CUTLASS SUPREME
1990-91 PONTIAC GRAND PRIX (WITH 2.3L ENGINE - VIN D - RPO LD2)
1990-92 BUICK SKYLARK
1990-92 OLDSMOBILE ACHIEVA
1990-92 PONTIAC GRAND AM
(WITH 2.3L ENGINE - VINs A, D, 3 - RPOs LGO, LD2, L40)
Some owners may experience a driveability concern such as hesitation or sag during the first two minutes of cold operation while vehicle is under
moderate to heavy throttle driveaway, or they may experience a Torque Converter Clutch (TCC) chuggle.
If the above conditions exist after following proper service manual diagnosis, it may be necessary to install a new MEM-CAL/EPROM to correct the
driveability concern.
