ENG. STALL AFTER HOT RESTART COLD START, & COLD ENG. HES.. Chevrolet Beretta 1988

For 1990-2009 cars

# ENG. STALL AFTER HOT RESTART COLD START, & COLD ENG. HES.

#### Model and Year: 1987 CAVALIER, CELEBRITY WITH 2.8L (VIN W) ENGINE 1987-88 BERETTA CORSICA WITH 2.8L (VIN W) ENGINE

Some 1987-88 models listed above, equipped with a 2.8L V-6 engine, may experience a cold start stall, a stall after start with a warmed-up engine or a stall during deceleration. A 5-speed manual transmission Beretta, Corsica, or Cavalier may also experience a hesitation during acceleration, primarily when the engine is cold (ambient temperatures of 40 to 70 degrees Fahrenheit). This hesitation may also be experienced during transmission gear shifts.

A repeated stall after hot restart may be caused by residue accumulating inside the throttle body bore behind the throttle plate, which limits the air flow past the throttle plate in the idle position. The hesitation concern may be due to a lean Electronic Control Module (ECM) fuel calibration. The cold start/stall may be due to a lean ECM calibration, low engine idle speeds, loss of fuel pressure, or loose electrical connections at the ignition coil and/or the mass airflow sensor.

The aforementioned customer comments may be repaired as follows:

1. Perform normal service procedures as outlined in the shop manual for the repair of engine stall or hesitation.

2. Verify that all electrical connections at the ignition coil and mass airflow sensor are secure.

#### NOTICE: LOOSE/POOR ELECTRICAL CONNECTIONS AT ALL SENSORS AND ECM METRI-PAK CONNECTORS CAN BE A PROBLEM ANYWHERE ON THE ENGINE. INTERMITTENT CONNECTION CAN PRODUCE STALLING.

3. Verify that there are no engine vacuum leaks at the manifold absolute pressure (MAP) sensor, positive crankcase ventilation (PCV) valve, exhaust gas recirculation (EGR), or other systems.

4. Verify that the fuel system is functioning properly and has proper fuel pressure. Reference Chevrolet Dealer Service Bulletin 87-83 (Section 6C) dated March 1987.

5. Clean the throttle body bore as specified in Chevrolet Dealer Service Bulletin 87-109R (Section 6E) dated May 1987.

6. Measure the minimum idle speed and throttle position, and adjust to specification if required (reference Chevrolet Dealer Service Bulletin 87-109 Reissue.

7. Replace the ECM MEMAL (see Attachment A), using the following installation procedure:

(a) Disconnect battery power. (b) Install new ECM MEMCAL calibration. (c) Reconnect battery power. (d) Start vehicle with AC/defroster off and power steering not cramped. (e) Allow vehicle to idle in drive for 6 minutes and until thermostat has opened. This will facilitate learning of base idle. (f) Return vehicle to service.

#### NOTICE: IT IS INAPPROPRIATE TO REPLACE THE MEM CAL AND RETURN THE VEHICLE TO THE CUSTOMER WITHOUT PROPERLY COMPLETING THE PREVIOUS SERVICE INSTRUCTIONS (ITEMS 1-6).

Use applicable labor time and operation numbers.

#### 1987 MODEL YEAR

VEHICLE BODY TYPE TRANSAXLE EMISSION SERVICE SPECIAL MODEL SERIES TRANS. RATIO/CODE SYSTEM MEMCAL P/N OPTIONS ---------------------------------------------------------------------------

CORSICA/ 1LT/1LV 3-SPD AUTO 3.18 FEDERAL 16087162 BASE AND GT BERETTA 1LT/1LV 3-SPD AUTO 3.18 CALIFORNIA 16088715 BASE AND GT

1LT/1LV 5-SPD MAN. 3.61 FEDERAL 16087172 BASE AND GT

1LT/1LV 5-SPD MAN. 3.61 CALIFORNIA 16088716 BASE AND GT

CELEBRITY 1AW19/27 5-SPD MAN. 3.61 FEDERAL 16087148 CELEBRITY EUROSPORT 1AW35 5-SPD MAN. 3.61 FEDERAL 16087122 WAGON

1AW19/27 3-SPD AUTO 2.84/7CTC FEDERAL 01228596

1AW19/27 3-SPD AUTO 3.18/7CXC FEDERAL 01228600

1AW35 3-SPD AUTO 3.18/7CXC FEDERAL 01228608 WAGON

1AW19/27 4-SPD AUTO 3.33 FEDERAL 01228604

1AW35 4-SPD AUTO 3.33 FEDERAL 01228612 WAGON

1AW19/27 5-SPD MAN. 3.61 CALIFORNIA 16088713 CELEBRITY EUROSPORT 1AW35 5-SPD MAN. 3.61 CALIFORNIA 16088714 WAGON

1AW19/27 3-SPD AUTO 2.84/7CTC CALIFORNIA 01228598

1AW19/27 3-SPD AUTO 3.18/7CXC CALIFORNIA 01228602

1AW35 3-SPD AUTO 3.18/7CXC CALIFORNIA 01228610 WAGON

1AW19/27 4-SPD AUTO 3.33 CALIFORNIA 01228606

1AW35 4-SPD AUTO 3.33 CALIFORNIA 01228614 WAGON CAVALIER 1JC* 1JD* 3-SPD AUTO 3.18 FEDERAL 01228533 1JE*

1JC/JD35 3-SPD AUTO 3.18 FEDERAL 01228533 WAGON

1JC** 1JD** 3-SPD AUTO 3.18 CALIFORNIA 01228534 1JE**

1JC/JD35 3-SPD AUTO 3.18 CALIFORNIA 01228534 WAGON

1JC*** 1JD*** 5-SPD MAN. 3.61 FEDERAL 16120949 1JE***

1JC/JD35 5-SPD MAN. 3.61 FEDERAL 16120949 WAGON

1JC**** 1JD**** 5-SPD MAN. 3.61 CALIFORNIA 16120953 1JE****

1JC/JD35 5-SPD MAN. 3.61 CALIFORNIA 16120953 WAGON

1JF37/67 3-SPD AUTO 3.18 FEDERAL 01228535 Z24

1JF37/67 3-SPD AUTO 3.18 CALIFORNIA 01228536 Z24

1JF37/67 5-SPD MAN. 3.61 FEDERAL 16120954 Z24

1JF37/67 5-SPD MAN. 3.61 CALIFORNIA 16120956 Z24

* = ALL FEDERAL MODELS ** = ALL CALIFORNIA MODELS *** = ALL FEDERAL MODELS **** = ALL CALIFORNIA MODELS

#### 1988 MODEL YEAR

VEHICLE BODY TYPE TRANSAXLE EMISSION SERVICE SPECIAL MODEL SERIES TRANS. RATIO/CODE SYSTEM MEMCAL P/N OPTIONS -----------------------------------------------------------------------------

CORSICA/ lLT/lLV 3-SPD AUTO 3.18 FEDERAL 16087162 BASE AND GT BERETTA lLT/lLV 3-SPD AUTO 3.18 CALIFORNIA 16088715 BASE AND GT

lLT/lLV 5-SPD MAN. 3.61 FEDERAL 16087172 BASE AND GT

lLT/lLV 5-SPD MAN. 3.61 CALIFORNIA 16088716 BASE AND GT

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.