SPECIAL POLICY: PROM CHANGE COLD STARTABILITY ADJUSTMENT. Oldsmobile Firenza 1983

For 1990-2009 cars

# SPECIAL POLICY: PROM CHANGE COLD STARTABILITY ADJUSTMENT

1983-84 FIRENZA MODELS EQUIPPED WITH MODELS/YEARS 2.0L ENGINE (VIN CODE P) AUTOMATIC TRANSAXLE & FEDERAL EMISSIONS SYSTEM

#### TO: ALL OLDSMOBILE DEALERS

#### CONDITION

This bulletin supersedes Dealer Technical Bulletin 84-T-20 dated November 30, 1984, which was mailed to Oldsmobile dealers in certain northern states.

Some 1983-84 Oldsmobile Firenza models equipped with 2.0L engine (LQ5), automatic transaxle and Federal Emissions system may experience no starts, poor cold start, and/or spark plug fouling. These starting conditions may be encountered at temperatures below -10 degrees F (-23 degrees C).

#### SPECIAL POLICY ADJUSTMENT

There are no time nor mileage provisions relating to subject vehicles. This special policy adjustment offer will expire June 30, 1985.

A copy of the "Special Policy Bulletin 84-1-30" should be filed in the 3 ring binder furnished to the dealer by General Motors in September 1982.

#### OWNER NOTIFICATION

Owners of vehicles registered in certain northern states will be notified by letter of this Special Policy by Oldsmobile. However, all subject vehicles are covered by this policy regardless of where they are registered or operated.

#### PREVIOUSLY SERVICED VEHICLES

1983-84 Oldsmobile Firenza models previously serviced with the cold startability adjustment parts identified in Dealer Technical Bulletin 84-T-20 dated November 30,1984, which developed a check engine light (Code 42) can now be corrected. The check engine light in many cases is being generated by false signals to the ECM and can be corrected by installing the correct PROM identified in the service procedure of this bulletin, 84-T-20A.

#### SERVICE PROCEDURE

#### Previously Serviced Vehicles

The check engine light malfunction may be remedied by the installation of the correct replacement PROM identified in this bulletin .In addition, 1983 models will require a new tune up label, part no. 14100954. No further action will be required.

#### Vehicles Not Previously Serviced

The following procedure will provide a significant improvement in cold startability of these vehicles.

1. Install a new calibration PROM per the following:

a. On l983 models use part number 1227254, PROM.

INSTALL (NEXT TO PRODUCTION LABEL) SUPPLEMENTARY TUNE-UP LABEL PART NO. 14100954 FOUND IN PROM PACKAGE.

b. On 1984 models with base axle (3.18) use part number 1227256, PROM. (Refer to Service Parts Identification Label.)

c. On 1984 models with FW9 (3A3) axle use part number 1227257, PROM. (Refer to Service Parts Identification Label.)

2. On 1983 models set ignition timing to 6 degrees BTDC from 0 degrees on 1984 models timing should be checked to assure 6 degrees BTDC.

THE TIMING CONNECTOR MAY BE LEFT DISCONNECTED FOR THE NEXT STEP.

3. Install spark bypass relay kit, part no. 14086983 (1983-84). Detailed instructions are included in the kit package. Reconnect the timing connector from Step 2.

4. Remove and discard the fuse labeled "crank" from the fuse block no. 2 position (3 amp fuse) (1983-84).

5. Install new spark plugs, part no. 5614009 (1983-84).

6. Install starting procedure label, part no. 14085150, on headliner side of driver's sun visor. Required on all 1983 models and as required on 1984 models (installed in production mid-1984).

THE OWNERS OF FIRENZA MODELS SHOULD BE ADVISED COLD WEATHER STARTING PERFORMANCE IS ALSO DEPENDENT ON THE USE OF 5W-30 SF OIL AS SPECIFIED IN THE OWNER'S MANUAL.

#### PARTS INFORMATION

The parts required to perform this Special Policy modification are to be ordered from WDDGM.

To ensure these parts are obtained as soon as possible, they should be ordered from WDDGM on a CIO Order with NO special instruction code, but order on an advise code (2).

Description Usage Part Number ----------- ----- ----------- PROM 1983 1227254 PROM 1984 w/3.18 Axle 1227256 PROM 1984 w/3.43 Axle 1227257 Spark Bypass Relay Kit 1983-84 14086983 Spark Plugs 1983-84 5614009 Sun Visor Starting Label 1983-84 14085150

#### WARRANTY CLAIM INFORMATION

When performing the repairs outlined in the Service Procedure of this bulletin, submit warranty claim for credit as follows:

Failed Failure Labor Labor Part No. Code Operation Hours -------- ------- --------- ----- As Applicable 92 T4081 .9

#### REIMBURSEMENT

Claims for customer reimbursement of previously paid repairs are to be submitted using Labor Operation T4082 and Trouble Code 92. For reimbursements, do not list parts or labor; instead, show the amount of reimbursement in the Sublet column.

#### OWNER NOTIFICATION

Owners of vehicles registered in certain northern states will be notified by letter of this Special Policy by Oldsmobile Division (refer to copy of owner letter in Special Policy Bulletin). However, all subject vehicles are covered by this Policy regardless of where they are registered or operated.

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.