Cavalier/Z24 L4-134 2.2L (1991)
Fuel: Customer Interest
Engine - Cold Acceleration Hesitation or Stall
Number: 91-222-6E
Section: 6E
Date: March 1991
Corporate Bulletin No.: 136502
Subject:
HESITATION OR STALL ON COLD ACCELERATION
Model and Year:
1990-91 CAVALIER, CORSICA, BERETTA WITH 2.2L ENGINE AND 3T40 AUTOMATIC TRANSMISSION
Condition:
Some owners of 1990 and 1991 J and L cars with 2.2L engines may comment of an engine hesitation or stall during a cold acceleration.
Cause:
Low volatility fuel that does not fully vaporize in a cold intake manifold.
Correction:
New PROM packages have been released which compensate for low volatility fuel during cold acceleration. Install the correct PROM
package based on the chart below, and recommend that the owner use low octane fuel (87 or equivalent).
Vehicles Affected:
Body
Model
Emissions
Assembly
Vehicles
Style
Year
Type
Plant
Affected
J
1990
Federal
Janesville
All
Lordstown
All
Calif.
Janesville
All
Lordstown
All
1991
Federal
Janesville
All
Lordstown
VIN Prior to M7173516
Calif.
Janesville
ALL
Lordstown
VIN Prior to M7173032
L
1990
Federal
Linden
All
Wilmington
All
Calif.
Linden
All
Wilmington
All
1991
Federal
Linden
VIN Prior to ME1 42136
Wilmington
VIN Prior to MY159347
Calif.
Linden
VIN Prior to ME142841
Wilmington
VIN Prior to MY159089
PROM Applications:
Body
Emissions
Broadcast
Scanner
PROM Part
Style
Type
Code
I.D.
Number
J
Federal
AWWM
8321
16158344
Calif.
AWWN
8331
16158349
L
Federal
AWWP
8341
16158354
Calif.
AWWR
8351
16158358
Parts are currehtly available from GMSPO.
Labor Operation Number:
T0500
