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Removal & Installation (2.2L - Cavalier - CNG)

WARNING: Natural gas is highly flammable. To reduce risk of fire and personal injury, keep sparks, flames, and smoking materials away from vehicle while you perform Compressed Natural Gas (CNG) fuel system service. CNG system operates at pressures up to 3600 psi (24820 kPa). Relieve CNG fuel system pressure before servicing CNG fuel system components to reduce risk of fire and personal injury. Before servicing any electrical component, ignition must be in Off or Lock position and all electrical loads must be off, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.
  1. Relieve CNG fuel system pressure. See FUEL SYSTEM PRESSURE RELEASE . Disconnect negative battery cable.
  2. Remove spare tire cover, jack and tool kit. Remove spare tire. Remove bolts attaching tank cover and remove tank cover from trunk. Remove tank vent boot cover nuts and cover. Disconnect Fuel Pressure Sensor (FPS) electrical connector. See Figure. Remove FPS from tank valve.
  3. Install FPS using a new "O" ring. Lubricate "O" ring with petroleum jelly. Tighten FPS to 20 ft. lbs. (27 N.m). Connect FPS and HPL electrical connectors. Connect negative battery cable.
  4. Start vehicle and check for CNG fuel leaks at each fitting using Leak Tester (J 41416). Install tank vent boot cover and nuts. Tighten tank vent boot cover nuts to 54 INCH lbs. (6 N.m). Install tank cover.
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