Bonneville V6-3800 3.8L (1991)
PROM - Programmable Read Only Memory: Customer Interest
Engine - Cold Start Stall/Chuggle At 35-45 MPH
Bulletin Number:
91-6-49
Reference Number:
106503R
Publish Date:
8/91
Subject:
COLD START STALL-CHUGGLE AT 35-45 MPH W/TORQUE CONVERTER CLUTCH ENGAGED REV. CALIB. MEM-CALS
Models
Affected:
1989-91 BONNEVILLE MODELS W/3800 ENGINE
Some owners of 1989 through 1991 Bonneville models equipped with the 3800 (Code C) Engine may experience one or both of the following
conditions:
^
Engine does not stay running on initial cold start.
^
Chuggle at 35-45 mph with torque converter clutch engaged.
The two conditions are independent of each other, yet it may be possible for both conditions to exist on one vehicle.
Follow the information outlined under the individual heading for that condition:
ENGINE DOES NOT STAY RUNNING ON INITIAL COLD START
If the vehicle's basic engine controls and fuel systems are operating properly, it is important for the technician to familiarize themselves with information
contained in Service Bulletin Number 91-6-9 "Recommended Fuels For Non-Turbo Port Fuel Injection Engines". If the condition cannot be repaired by
changing fuel or using currently published service and diagnostic procedures, it may be necessary to install a revised calibration mem-cal. Install
mem-cals listed in Table A for this condition only.
CHUGGLE AT 35-45 MPH WITH TORQUE CONVERTER CLUTCH ENGAGED
