Lebaron Sedan V6-181 2972cc 3.0L SOHC VIN 3 FI (1991)
Powertrain Control Module: Customer Interest
ECM - Rough Idle/Startup Dieout & or Hesitation
NO.: 18-14-92 Rev. A
GROUP: Driveability
DATE: Dec. 22, 1992
SUBJECT:
Rough Idle/Startup Dieout And/Or Sag/Hesitation Following Cold Engine Startup - 3.0L MMC Engines
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 18-14-92 WHICH SHOULD BE REMOVED FROM YOUR FILES. THE
SBEC (POWERTRAIN CONTROL MODULES FOR 1992 MODELS HAVE BEEN REVISED). REVISIONS ARE PRINTED AND HIGHLIGHTED
WITH **ASTERISKS**.
MODELS:
1991-1992 (AA)Acclaim/Spirit/LeBaron Sedan
(AC)Dynasty/New Yorker Salon
(AG)Daytona
(AJ) LeBaron Coupe/LeBaron Convertible
(AS)Caravan/Grand Caravan/Caravan C/V
Voyager/Grand Voyager
SYMPTOM/CONDITION:
Some vehicles may experience rough idle, sag soon after initial launch or startup dieout following a cold start. This may occur when the engine is cold
and the ambient temperature is between 60~F and 90~F.
DIAGNOSIS:
Using MDS or the DRB II (Scan Tool) and appropriate diagnostic procedure manual, verify that all vehicle engine systems are functioning as designed.
If messages/fault codes (diagnostic trouble codes) are present, record them on the repair order for future reference, and repair as necessary. If no
messages/fault codes (diagnostic trouble codes) are present and all systems are functioning correctly, proceed with the following repair.
REPAIR PROCEDURE:
This repair involves replacement of the Single Board Engine Controller (SBEC - Powertrain Control Module) with a revised one.
1.
With the ignition key in the OFF position, disconnect the battery.
2.
Remove the SBEC (Powertrain Control Module) as outlined in the appropriate service manual, and replace the SBEC (Powertrain Control
Module) with unit called out in PARTS REQUIRED.
3.
Connect the battery.
4.
Type the required information on the Authorized Modification Label, as illustrated, and attach near the VECI Label.
PARTS REQUIRED:
