1989 Plymouth Colt BaseFACTORY OEM SERVICE PROCEDURE

Remove, Overhaul & Install: Remove/Install/Overhaul: Introduction: Carburetor: Disassembly

  1. Remove damper spring, throttle return spring and bracket. Remove throttle opener/dashpot and bracket. Remove vacuum hoses, vapor hoses and vacuum delay valve.
  2. Use a pin or other small tool to depress stopper tabs on the 3 throttle position sensor terminals. Remove wire and terminal from rear of connector. DO NOT bend terminal.
  3. Remove 2 long and 4 short float chamber cover screws. Remove throttle body. See Fig 1. Remove 4 short screws holding air horn assembly to mixing body and separate by gently prying with screwdriver between enrichment jet cover and air horn. See Figure. Set mixing body aside.
  4. From air horn assembly, remove float pin, float, and needle valve. To remove needle valve seat, use 2 flat bladed screwdrivers to carefully pry up on projecting edges of valve seat. Remove and discard "O" ring and gasket under seat.
  5. Use pin or other small tool to depress stopper tabs on 2 feedback solenoid valve terminals and remove wire from rear of connector. Remove feedback solenoid valve and retainer, discard "O" rings.
  6. Use pin or other small tool to depress stopper tabs on the 2 slow-cut solenoid valve terminals and remove wire from rear of connector. Remove slow-cut solenoid valve retainer. Hold valve body and pull out. Discard "O" rings.
  7. If choke housing is to be removed, it is necessary to grind away the 2 rivets securing retainer plate. Remove single screw and use punch to knock out remaining rivet bodies. Remove choke plate assembly. Remove wire and terminal from rear of connector. DO NOT bend terminal.
  8. Remove 3 screws holding the enrichment cover. Remove cover, 2 diaphragms, spring seat, body, 2 springs and valve. Keep in order of disassembly. Remove the mixture control valve assembly. Keep springs and diaphragms in order of disassembly. Remove any brackets.
  9. Remove check weight and ball, and steel ball of anti-overfill device from mixing body. Remove main jets from jet blocks. Using a screwdriver, remove pilot jet retainer and pilot jet. Remove accelerator pump mounting screws, pump cover and link assembly, diaphragm, spring, body and gasket from mixing body.
  10. Remove choke unloader and vacuum hose. Remove throttle lever assemblies. Keep in order for reassembly purposes. Remove throttle position sensor. The idle mixture adjustment screw is accessible only by drilling and knocking out plug in carburetor base.
Fig 1: Air Horn Screw Locations for Chrysler Motors 2-Barrel
G120218Courtesy of CHRYSLER MOTORS.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.