Parisienne V8-305 5.0L (1985)
Carburetor Jet: All Technical Service Bulletins
Engine - Poor Driveability After Starting a Hot Soak
Number 86-6(Gasoline)-29A Date
12/86
Subject:
ENGINE SURGE AFTER A HOT SOAK
1983-86 V8 ENGINES WITH SPECIFIC E4ME CARBURETORS
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:
17059320
17083218
17085202
17086004
17059322
17084201
17085203
17086005
17083204
17084205
17085204
17086006
17083205
17084208
17085207
17086040
17083206
17084209
17085218
17083207
17084210
17086003
Primary Metering Jet Replacement:
Refer to appropriate vehicle 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 #J-33815-1 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, #J-33815-1 or equivalent or by setting adjusting (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
degrees at idle. If not, adjust air bleed valve to obtain.
9.
Reconnect canister purge and install air cleaner housing.
Parts Required:
17082634 - Jet Assemblies
One package required.
17067279 - Air Horn Gasket One package required.
NOTICE:
THESE METERING JETS CAN ALSO BE USED WITH CARBURETOR BLOWER FANS ON "F" CARS (REF: PONTIAC
BULLETIN 86-6(GASOLINE)-17, FEBRUARY, 1986)
