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Disassembly (Fuel Meter Assembly Model 220)

  1. Place throttle body on Holding Fixture (J-9789-118 or BT-30-15) to prevent damage to throttle valve. Remove fuel meter cover assembly-to-fuel meter body screws (note location of short screw). See Fig 1. Remove fuel meter cover assembly. Remove and discard pressure regulator dust seal. Fuel meter cover assembly and pressure regulator are serviced as an assembly. DO NOT remove pressure regulator from cover assembly.
  2. Remove fuel injectors. Note location of fuel inlet and outlet nuts and remove. Discard gaskets. Remove fuel meter body assembly-to-throttle body screws. See Fig 1. Remove fuel meter body assembly. Remove and discard fuel meter body assembly gasket and fuel meter outlet gasket.
  3. Remove TP sensor, IAC valve, ISC actuator, rubber components and gaskets. Clean all remaining (metal) parts in a cold immersion-type cleaner such as Carbon X (X-55). Blow dry with compressed air. Inspect mating surfaces for damage which may prevent gasket sealing. Repair or replace faulty components.
Fig 1: Exploded View Of Throttle Body (TBI 220)
G95A27433Courtesy of GENERAL MOTORS CORP.
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