EXTENDED CRANK TIME NEW CHOKE COIL/COVER P/N

MODELS/YEARS 1982-84 CUTLASS SUPREME, 88, 98 AND TORONADO

Some 5.0L V-8 engines may experience an extended cranking time (10-30 seconds) after warm engine operation and an overnight waiting period. This is due to the fuel in the carburetor bowl evaporating and lowering the fuel level.

To reduce the time required to get fuel to the carburetor, the following procedures have been developed.

1. Fuel Pump Operational Checks

Vacuum - Install vacuum gage on pump inlet and crank engine to obtain maximum vacuum. After 15 seconds, gage reading should be at least 15 inches Hg.

Volume - Install hose from pressure line to a suitable container. Pump should supply at least 1/2 pint of fuel in 15 seconds with engine idling.

Pressure - Install gage on pressure line with gage located approximately 16 inches above the fuel pump. Pinch the fuel return line closed. With engine idling, pressure should be at least 5 1/2 psi.

The fuel pump must pass all 3 operational checks or replacement is required.

2. Choke Operation (Except Carburetor Number 17084256 and 17084258)

Install new choke coil and cover kit, part no. 17110646.

3. Carburetor Base Gasket

Inspect base gasket color. If black, replace with new base gasket, part no. 22508038 which is brown in color.

4. Carburetor Float Level

Check float level setting. Setting must be within 1/16 inch of specifications.

5. Ignition Timing

Ignition timing can vary with engine temperature. Timing must be set to specifications at normal operating temperature.

6. Starting Procedures

NOTICE: Do not crank the engine for more than 15 seconds at a time. Wait 10 to 15 seconds between each crank time to prevent starter damage.

Cold Engine

Press the accelerator pedal to the floor and slowly release it. (Press it three or four times if outside temperatures are less than 0 DEG F., or if the car has been standing idle for several days.) Then, with your foot OFF the pedal, crank the engine by turning the ignition key to "Start." Release the key when the engine starts.

If the engine does not start, or starts but fails to run, repeat this procedure.

Warm Engine

Do not press down on the accelerator pedal. With your foot off the pedal, crank the engine by turning the ignition key to "Start." If the engine does not start after three seconds of cranking, press down the accelerator pedal to 1/3 of its travel while cranking. Release key and accelerator pedal when the engine starts.

If the engine does not start, press accelerator pedal to the floor and slowly release it three or four times. Repeat warm engine starting procedure.

WARRANTY INFORMATION

Failed Trouble Operation Labor Operation Part No. Code Number Hours --------- --------- ---- ------ ----- Perform all checks. 17110646 92 T4078 .9 Replace choke cover & base gasket.

Replace fuel pump - add: .7

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.