PROM - Occasional Engine Stalling
90oldsmobile04SUBJECT OCCASIONAL ENGINE STALL (DIAGNOSTIC CHECKS
AND NEW SERVICE MEMCAL)
MODELS/YEARS 1989 CUTLASS CIERA AND CUTLASS SUPREME WITH
2.8L (VIN CODE W) ENGINE
NUMBER: 89-T-49A
CORP.REF.NO: 936001
DATE: April 1990
SECTION: 6E
This Bulletin cancels and supercedes Dealer Technical Bulletin 89-T-49 which may be discarded. Memcal part numbers for Manual Transmission Models have been changed.
Some customers driving 1989 Cutlass Ciera or Cutlass Supreme Models with the 2.8L (VIN Code W) Engine may comment concerning any of the following:
A cold start stall, A tip-in hesitation, or A deceleration stall
If a customer comment concerning an occasional engine stall or a drive hesitation is received, then complete the following:
1. Perform diagnostic checks, per Section 6E of the Service Manual and replace any defective components.
Proceed to Step # 2 only if diagnostic checks uncover no cause for the customer comments.
2. Install a new MEMCAL, which may be obtained from GMSPO (reference the attached service part number chart).
IMPORTANT: The following procedure must be completed when removing and installing a 60 degree V6 Engine Control Module (ECM) MEMCAL
a). Disconnect the battery.
b). Remove current MEMCAL and install a new service MEMCAL.
c). Restore the battery power and place air conditioning controls (if equipped) in the "off"
position.
d). Firmly apply the parking brake and block the drive wheels. Start the engine, and shift the
transaxle to "drive" for automatics or "neutral" for manuals.
e). Allow the engine to run until the engine cooling fan has cycled once, or a maximum of 10
minutes.
Turn the ignition key to the "off" position for at least 5 seconds.
g). Start the engine, and shift the transaxle to "drive" for automatics or "neutral" for manuals.
h). Allow engine to run for at least 5 minutes.
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
Labor Operation Number: T1426
Labor Time: 0.7 Hour
Trouble Code: 92