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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 114 (Engine Controls - Removal, Overhaul & Installation) >> Fuel Systems >> Fuel Rail & Injectors >> Installation

Fuel Rail & Injectors: Installation

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages. If injector is replaced, ensure replacement injector has the same part number as injector removed. Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components. Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.
  1. Lubricate the NEW injector "O" rings with clean engine oil. Install the injector upper "O" ring on the fuel injector. Install the fuel injector onto the fuel rail. Install the fuel injector clip on the fuel injector. Install the NEW injector lower "O" ring seals on the spray tip end of each injector. Install the fuel rail assembly onto the intake manifold. A snap will be heard when the injectors are properly seated.
  2. Connect the fuel injector electrical connectors to each fuel injector. Connect the fuel pressure regulator vacuum hose. Connect the fuel feed and return pipes to the fuel rail. Reconnect the negative battery cable.
  3. Inspect for leaks by using the following procedure.
    • Turn ignition on for 2 seconds.
    • Turn ignition off for 10 seconds.
    • Turn ignition on.
    • Check for fuel leaks.


CAUTION: Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector "O" rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination. Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components. Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.
  1. Lubricate the NEW upper and lower injector "O" ring seals with clean engine oil. Install the NEW upper "O" ring. Install the fuel injector(s) on the fuel rail. Install the NEW lower "O" ring on the spray tip end of each injector. Install the fuel rail. Install the fuel rail attaching stud. Tighten the studs to specification. See TORQUE SPECIFICATIONS .
  2. Connect the fuel injector electrical connectors to each fuel injector. Install the fuel rail bracket retainer nut. Tighten the nut to specification. Install the PCV valve to the valve cover. Install the coolant surge tank inlet pipe. Install the PCV air tube to the valve cover. Connect the fuel pressure regulator vacuum hose. Connect the fuel feed and return pipes to the fuel rail. Connect the negative battery cable.
  3. Inspect for leaks by using the following procedure.
    • Turn ignition on for 2 seconds.
    • Turn ignition off for 10 seconds.
    • Turn ignition on.
    • Check for fuel leaks.
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