Calais L4-151 2.5L VIN U TBI (1989)
PROM - Programmable Read Only Memory: Customer Interest
PROM - Multiple Driveability Concerns
NUMBER:
89-T-137
CORP.REF.NO:
936516R
OATE:
October 1989
SECTION:
6E
SUBJECT:
MULTIPLE DRIVEABILITY CONCERNS FOR 2.5L ENGINE (INSTALLATION OF NEW PROM)
MODELS/YEARS:
1987-89 CUTLASS CALAIS AND CUTLASS CIERA
This bulletin cancels and supersedes Dealer Technical Bulletin 88-T-54.
This bulletin contains new and revised calibrations to address additional driveability conditions.
Some 1987-89 Cutlass Calais and Cutlass Ciera models may exhibit one or more of the following driveability conditions:
1.
Hard Hot Engine Restart
2.
Intermittent Higher Than "Normal" Idle
3.
Spark Knock (Detonation)
4.
Code 42
If these conditions cannot be addressed through normal service procedures, they may be repaired by installing the appropriate hardware as outlined
below.
SERVICE PROCEDURE:
1.
Use a scanner to determine the PROM I.D. that is currently In the vehicle.
