Celebrity L4-151 2.5L (1982)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine - Detonation on Acceleration
Subject:
REVISED SERVICE PROM CALIBRATION - 1982 "A" AND "X" CARS EQUIPPED WITH 2.5L EFI AND AUTOMATIC TRANSAXLE
NUMBER:
82-T-98
SECTION:
VIT
DATE:
Aug. , 1982
A new PROM has recently been released with revised spark timing calculations and slightly increased idle speeds.
The change in spark timing was made to eliminate any detonation under moderate acceleration at cruising speeds (40-55 mph). The increased idle speed
will reduce vibration or shake at idle speeds.
The service part number for this PROM is 1226169 (broadcast code 0262-AOS). This PROM is to only be used on 1982 Citation and Celebritys with the
2.5L EFI, automatic transaxle and first design (3-board) ECM. The second design (2-board) ECM has the spark revision already incorporated in its
PROM.
PROMs should be replaced only as required to correct the above conditions.
Use applicable labor operation.
