SPECIAL POLICY:ENGINE SURGE- NEW DESIGN METERING JETS

VEHICLES INVOLVED: 1983-85 FIREBIRD WITH L69 305 V8 ENGINE VIN CODE G (MANUAL TRANSMISSION ONLY)

1983-86 FIREBIRD WITH LG4 305 V8 ENGINE VIN CODE H (MANUAL TRANSMISSION ONLY)

Customer comments of engine surge after a hot soak may be received. A hot soak is when a vehicle has reached operating temperature, then parked for a short time, and restarted. The surge is caused by excessive fuel vapor in the carburetor bowl. This fuel vapor is created by the temperature difference of the carburetor bowl and the fresh fuel delivered from the fuel tank on a restart. This surge condition can be reduced by installing new design primary metering jets in the carburetor.

PART NUMBERS OF CARBURETORS AFFECTED:

17059322 17084205 17085203 17086005 17083205 17084209 17085207 17086040 17083207

SPECIAL POLICY ADJUSTMENT

This special policy covers the condition described above for a period of five (5) years or 50,000 miles, whichever occurs first, from the date the vehicle was originally placed in service.

The policy includes installation of a revised carburetor main jet and, if necessary, the installation of an auxiliary blower fan to direct air at the carburetor bowl.

This "special policy adjustment" bulletin should be filed in the Special Policy Adjustment Bulletin binder previously furnished to the dealer by General Motors.

PARTS REQUIRED

17082634 - Jet Assemblies (One package required) 17067279 - Air Horn Gasket (One package required)

There may be some vehicles that the metering jet replacement will not correct completely. If this occurs, it will be necessary to install an auxiliary blower fan. This fan is designed to operate at an engine coolant temperature of 220"F (106 DEG C) and stays operational until the coolant reaches 195 DEGF (90 DEG C). Listed below is the service blower kit part number:

Part Number Usage ----------- ----- 14094395 Pontiac Firebird

NOTE: Dealer installation instructions included as part of kit.

NOTICE TO DEALERS: IN EACH KIT THERE IS A ONE-PAGE FLYER EXPLAINING THE BLOWER KIT OPERATION. PLEASE INSURE THAT THE CUSTOMER RECEIVES THIS FLYER.

PRIMARY METERING JET REPLACEMENT:

Refer to Pontiac Firebird Service Manual (Section 6C1) for carburetor disassembly and adjustment information.

NOTICE: REPLACING THE PRIMARY METERING JETS IN THE E4ME CARBURETOR REQUIRES REMOVING THE MIXTURE CONTROL SOLENOID AND THE FLOAT. THEREFORE, THE ADJUSTMENTS AFFECTING THESE COMPONENTS MUST BE CHECKED AND ADJUSTED, IF NECESSARY, DURING REASSEMBLY. THE FOLLOWING STEPS SHOULD BE FOLLOWED AS A GENERAL GUIDE TO THE REPLACEMENT OF THE METERING JETS.

DISASSEMBLY

1. Remove air cleaner.

2. Remove air bleed valve cover.

3. Remove air horn.

4. Remove solenoid adjusting (lean stop) screw and solenoid (rich) stop screw plugs.

5. Remove mixture control solenoid assembly.

NOTICE: IF TOOL #J33815-1 OR EQUIVALENT IS NOT USED FOR REINSTALLING MIXTURE CONTROL SOLENOID, IT WILL BE NECESSARY TO RECORD NUMBER OF TURNS WHEN REMOVING ADJUSTING (LEAN STOP) SCREW.

6. Remove float.

7. Remove primary metering jet assemblies.

REASSEMBLY

1. Install new primary metering jet assemblies.

2. Install float and adjust if necessary. The specification for float level is 11/32".

3. Install mixture control solenoid using tool, #J33815-1 or equivalent by setting adjusting or (lean stop) screw to the same number of turns recorded in step #5 of DISASSEMBLY.

4. Install air horn with new gasket.

5. If carburetor has a removable pump lever hinge pin, install the cotter pin supplied in air horn gasket, following package instruction.

6. Check mixture control solenoid plunger travel: should be 4/32". If not, adjust solenoid (rich) stop screw to obtain correct travel.

7. Install solenoid adjusting (lean stop) and solenoid (rich) stop screw plugs.

8. Check mixture control solenoid dwell with engine running in closed loop and canister purge disconnected. Dwell should read approximately 30 DEG at idle. If not, adjust air bleed valve to obtain.

9. Reconnect canister purge and install air cleaner housing.

CLAIM INFORMATION

A separate repair order must be used for each vehicle. A completed warranty claim is to be kept as a permanent record of completion.

DEALERS SHOULD SUBMIT WARRANTY CLAIMS FOR CREDIT IN THEIR NORMAL MANNER WHEN THEY PERFORM THE SERVICE AS FOLLOWS:

Failure Labor Labor Operation Code Operation Hours --------- ---- ---------- ----- Replace Carburetor Main Jets 82 T1175 1.2 Surge

Install Auxiliary Blower 82 T1176 1.2 Surge

For Owner Reimbursement on Previous Repairs Use T3164

Parts required are to be listed in your warranty claim in the normal manner. Parts will be credited at dealer net plus 30% dealer handling allowance.

Dealers will be credited via Warranty Document or Terminal Transmission, whichever is their normal method of submission for payment. Claims must contain all information required and should list the labor operation as outlined.

REIMBURSEMENT

Claims for customer reimbursement of previously paid repairs are to be submitted as indicated above in CLAIM INFORMATION section.

RECORDING COMPLETION

Repairs submitted for vehicles not involved in the Special Policy will not be paid.

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.