Regal Estate Wagon V6-252 4.1L VIN 4 4-BBL (1982)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - Poor Driveability Corrections
Model Year
1983
Bulletin No. 83-143
File in Group
64A
Number
17
Date
July 83
SUBJECT:
DRIVEABILITY CORRECTIONS - 4.1L ENGINE/LC4
MODELS AFFECTED:
ALL FEDERAL 1982 & 1983 REGALS AND REGAL WAGONS EQUIPPED WITH A 3-SPEED TRANSMISSION, CO
A new 4.1L/LC4 calibration has been released for production and service on the above models. This new driveability fix is to be used for dealer
correction of any one of or combination of the conditions listed below, when it has been determined that affected systems are within specifications and
are functioning normally.
The changes consist of the following:
1.
New thermac sensor
2.
New PROM
The following conditions describe when to use the changes:
1.
Poor cold acceleration maneuvers
2.
Tip-in stumble or sag during warm-up and excessive burst knock
Before a decision is made to install the new parts, the vehicle should be road tested, if possible, for the owner described conditions and vehicle systems
checked to determine if adjustments are within specifications. Unless all areas listed on the checklist are correct, a parts change will not be effective for
the purpose intended.
One part cannot be installed without the other.
Zone authorization is required prior to usage of the parts.
PARTS ORDERING INFORMATION
^
Thermac Sensor 8997916
^
PROM Regal 1226481
LeSabre & Electra
1226482
WARRANTY INFORMATION
^
Thermac sensor and PROM
Labor Operation
T0119
Labor Time
0.7 Hrs.
Trouble Code
92
System performance check will not be required with this change.
BURST KNOCK (MOMENTARY DETONATION) CHECKLIST
^
Ignition Timing
^
EGR Valve System Operation
^
Vacuum Hoses and/or Connection Leaks
^
Carburetor for Lean Operation
^
Deposits in Combustion Chambers
^
Intake Valve Seals not Sealing
^
MAP/BARO Sensor Operation
^
E.F.E. Operation
^
T.A.C. Operation
^
Overheating-Cooling Sys. Prob
^
Incorrect Spark Plug
^
Bad Fuel
^
E.S.C. not Working (If Equipped)
