LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 1990 >> Wrangler Base, 4.2 T, Standard >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Carburetor (4.2L) R & I >> Disassembly

Carburetor (4.2L) R & I: Disassembly

  1. Place carburetor on a repair stand. Remove stepper motor (if equipped). Remove retaining clip from accelerator pump arm link. See Fig 1 . Remove link.
    Fig 1: Exploded View of Carburetor (4.2L)
    G90C17089Courtesy of CHRYSLER MOTORS.
  2. Remove cover and gasket from top of air horn. Remove screws and locks from accelerator pump arm and vacuum piston rod lifter. Slide pump lever out of air horn. Remove pump arm and rod lifter, and "S" link. See Fig 1 .
  3. Remove vacuum piston and metering rods as an assembly. Remove vacuum piston spring. Remove valve seal from lever if air horn is to be immersed in cleaning solution. Disconnect clips and remove link from choke housing lever and choke lever arm.
  4. Remove screw and lever from choke shaft. Remove choke vacuum diaphragm hose. Remove choke diaphragm, linkage and bracket assembly. Remove fast idle cam retaining screw. Remove fast idle cam, choke linkage and clip. Grind heads off choke cover rivets. Remove choke cover, retainers and remaining portions of rivets.
  5. Remove gasket and baffle. Remove choke housing from throttle body. Remove screws and separate air horn from main body. Discard gasket. Remove sole-vac solenoid. Remove accelerator pump, spring and ball.
  6. Remove fuel inlet needle valve, seat and gasket from main body. Remove float fulcrum pin retainer and baffle. Lift out floats and fulcrum pin. Remove main metering jets.
  7. Remove venturi cluster screws. Remove cluster and gaskets from main body and discard gaskets. DO NOT  remove idle orifice tubes or main vent tubes from cluster. They can be cleaned with solvent and dried with compressed air while assembled.
  8. Turn carburetor upside-down and catch accelerator pump discharge check ball as it falls out. Turn idle limiter caps to stop position. Remove plastic caps from idle air mixture screws. Count number of turns necessary to fully seat screws. This will ease reassembly adjustment. Remove screws and springs from throttle body.
  9. Remove screws and separate throttle body from main body. Discard gasket. Check choke plate in air horn for freedom of movement. If sticking or binding is evident, clean thoroughly.
scientia non olet · About LEMON Manuals