PROM - Cold Start/Decel Stall or Tip-in Hesitation
89buick05Bulletin 89-6E-5
Date Mar., '89
Ref. No. 89-100-6E
Corp. Ref. No. 936001
SUBJECT: OCCASIONAL ENGINE STALL (DIAGNOSTIC CHECKS AND NEW SERVICE MEMCAL)
MODELS AFFECTED: 1989 REGALS WITH 2.8L (VIN W) V-6 ENGINE
Some customers driving the 1989 Regals with a 2.8L V-6 engine (VIN Code W) may comment concerning any of the following:
A cold start stall, A tip-in hesitation, or A decel 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 6 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 Electronic Control Module (ECM) MEMCAL (Reference Buick Bulletin 89-6E-2, dated 11-15-88).
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.
f). 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.
MEMCAL CHART
EMISSION TRANSAXLE SCANNER SERVICE
YEAR MODEL SYSTEM TRANS. RATIO I.D. MEMCAL P/N
1989 Regal FED ME9 8151 16138169
1989 Regal CAL ME9 8141 16138164
Parts are expected to be available on March 6, 1989. Until then normal part orders will not be accepted by GMSPO. Only verifiable emergency VIP orders will be accepted. SPO will make every effort to obtain parts. All parts will be placed on 400 control to waive VIP surcharges. However, the part will be shipped premium transportation at dealer's expense. All other order types will be canceled as incorrectly ordered while the 400 control is in place.
WARRANTY INFORMATION
Labor Operation Number: T1426
Labor Time : .7 Hours
Trouble Code : 92