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Home >> GMC >> 1990 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Gasoline) >> Throttle Body >> Cleaning & Inspection

Cleaning & Inspection

  1. Remove TPS, IAC, throttle body cover, fuel meter assembly and pressure regulator assembly, fuel injector, fuel filter, rubber parts and diaphragms. Clean all remaining (metal) parts in a cold immersion-type cleaner such as Carbon X (X-55). Blow dry with compressed air.
  2. Inspect mating surfaces for damage that may prevent gasket sealing. Repair or replace faulty components.
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