Chuggle at 40-45 MPH, Tip-in Hesitation
Model Year 1982Bulletin No. 82-T-93A
File in Group 64
Number 31A
Date July '83
SUBJECT: CALIFORNIA LESABRE DRIVEABILITY
MODELS AFFECTED: ALL 1982 CALIFORNIA LESABRES EQUIPPED WITH A 3.8L (LD5) ENGINE
NOTICE: This bulletin supersedes Bulletin 82-T-93, Filed in Group 64, due to incorrectly published EGR Part Number. Bulletin 82-T-93 should be destroyed and replaced with this revision.
A PROM, #1225707 and EGR valve #17079787 with revised calibrations are available for any combination of the conditions listed below which might occur on 1982 California LeSabres with 3.8L, V6 engines. It must first be determined that affected vehicle systems are within specifications and functioning normally before installing these parts.
A. Chuggle at 40-45 MPH
B. Tip-in Hesitation
Vehicle should be road tested, to verify the owner described conditions. Unless all other areas are correct, the PROM and EGR valve will not be effective. Use the attached check lists for additional assistance, as necessary.
A. Condition: Chuggle - also referred to as surge, is most noticeable at 40-45 MPH, and should not be confused with "Freeway Hop", a common condition in many areas. Converter clutch engage speed is increased to 50 MPH from 41 MPH.
B. Condition: Tip-in Hesitation: may be experienced during either hot or cold operation, while going through a light or moderate acceleration period, from a stationary vehicle position.
If any one or combination of conditions exist, install both parts, PROM and EGR valve. These parts will be used in production for late 1982 model vehicles.
PARTS INFORMATION
Obtain the following two (2) parts from your normal GM Parts Division Warehouse:
Original Equipment PROM ID
^ PROM #1225707 16030034 BOH
^ EGR Valve 17079787
WARRANTY INFORMATION
Labor Operation Number T0112
Trouble Code 92
Labor Time 0.6 Hrs.
^ Replace PROM and EGR Valve System Performance Check Not Necessary
CHUGGLE CHECK LIST
^ Park-Neutral Back Up Light Switch Adjustment
^ Base Ignition Timing and Total Advance
^ Spark Plugs and Plug Wires
^ HEI Operation at Problem Speeds
- Includes Checking for Correct Distributor Wave Washer
^ Speedometer Needle for Fluctuation (Sticking or Kinked Cable and/or Speedo Head will Cause Vehicle Speed Sensor (VSS) to Engage - Disengage TCC)
^ Evaporate Emission Control System (EECS)
- Purge Solenoid Operation
- Hoses and Correct Hose Connections
- Canister Vent Valve Operation
HESITATION CHECK LIST
^ EGR Valve System Operation
^ Accelerator Pump System Operation - Pump Shot
^ Vacuum Hoses, Fittings and Connections
^ Ignition Timing
^ Carburetor Float Level - 9/32 +/- 1/32
^ C-3 Wiring Proximity to High Voltage Wiring
^ EFE System Operation
^ T.A.C. System Operation
^ Overheating - Cooling System Problem
^ Incorrect Spark Plugs
^ Bad Fuel
^ EGR Override Relay Circuit
^ MAP/BARO Sensor Operation