Caprice V8-305 5.0L (1986)
Carburetor Jet: All Technical Service Bulletins
Engine - Surge After a Hot Soak
Number:
86-222
Section:
6C
Date:
FEB..., 1987
Subject:
ENGINE SURGE AFTER A HOT SOAK
Model and Year:
1983-86 CHEVROLET PRODUCED V-8 PASSENGER CARS WITH E4ME QUADRAJET 4BBL CARBURETORS
TO:
ALL CHEVROLET DEALERS
This bulletin cancels and supercedes Dealer Service Bulletin 86-60 Reissue (Section 6C) dated Dec., 1986. All copies of 86-60 Reissue should be
destroyed, it did not include steps 8 or 9 of the reassembly procedure. Replacement of carburetor primary metering jets is covered under the 5
year/50,000 mile emission warranty.
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.
Jet Replacement Continued
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.
