LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1993 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Gasoline) >> Intake Manifold Tuning Valve (CPI) >> Removal & Installation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Removal & Installation

  1. Disconnect intake manifold tuning valve electrical harness connector. Remove intake manifold tuning valve retaining screws. Discard "O" ring. Use carburetor cleaner to remove carbon deposits. DO NOT  soak tuning valve assembly in solvent.
  2. To install, reverse removal procedure. Lubricate NEW "O" ring with clean engine oil. Apply thread locking compound (Loctite 262) to intake manifold tuning valve retaining screw threads. Tighten retaining screws to 18 INCH lbs. (2 N.m). Reconnect electrical harness connector.
scientia non olet · About LEMON Manuals