FALSE CODE 43 SET NEW SERVICE PROM P/N'S

MODELS/YEARS: 1982-86 FIRENZA MODELS AND 1985-86 CALAIS MODELS

Some 1987 Firenza and Cutlass Ciera models equipped with the 2.8L PFI engine may set a false Code 43. The false code will be set under a deep, part throttle crowd between 3400 and 4400 engine rpm. As a result of setting this code, the "service engine soon" light will come on and generally will stay on until the ignition key is turned off. A Code 43 will be stored.

To service customer complaints, perform service diagnosis for Code 43 as defined in the Service Manual, section 6E3, to correct any of the following conditions: faulty knock sensor, "intermittents", faulty connections, open or shorted wiring problems, or MEM-CAL.

To correct the MEM-CAL, a new part number MEM-CAL will be required.

The part numbers and model applications are shown in the following chart:

Service Parts Transaxle Emission Identification Models Trans. Ratio Calibration Label Code MEM-CAL ------ ------ --------- ----------- -------------- ------- Cutlass Ciera Auto 3-Sp. 2.84 Federal/ F17 16072936 Canadian

Cutlass Ciera Auto 3-Sp. 2.84 California F17 16072946

Cutlass Ciera Auto 3-Sp. 3.18 California F75 16072967

Cutlass Ciera Auto 4-Sp. 3.33 Federal/ GX3 16072977 Canadian

Cutlass Ciera Auto 4-Sp. 3.33 California GX3 16072987

Cutlass Cruiser Auto 3-Sp. 3.18 California F75 16073017

Cutlass Cruiser Auto 4-Sp. 3.33 Federal/ GX3 16073027 Canadian

Cutlass Cruiser Auto 4-Sp. 3.33 California GX3 16073135

Cutlass Ciera Auto 3-Sp. 3.18 Federal/ F75 16072957 Canadian

Cutlass Cruiser Auto 3-Sp. 3.18 Federal/ F75 16073007 Canadian

Firenza Auto 3-Sp. 3.18 Federal F75 16073192

Firenza Auto 3-Sp. 3.18 California F75 16073196

Firenza Auto 3-Sp. 3.18 Federal F75 and T46 16073202

Firenza Auto 3-Sp. 3.18 California F75 and T46 16073206

Firenza Man 5-Sp. 3.61 Federal FX8 16073212

Firenza Man 5-Sp. 3.61 California FX8 16073216

Firenza Man 5-Sp. 3.61 Federal FX8 and T46 16073222

Firenza Man 5-Sp. 3.61 California FX8 16073226

Use applicable labor time and operation numbers.

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.