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Installation (GS300 & IS300)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install NEW "O" rings, insulators and grommets on injectors. Apply a light coat of gasoline to fuel injector "O" rings. Apply a light coat of gasoline to fuel rail injector opening. Using a twisting motion, push injectors into fuel rail. Ensure injectors are fully seated in fuel rail. Ensure fuel injector connectors are positioned outward.
  2. Install 3 spacers in position on intake manifold. Apply a light coat of gasoline to intake manifold injector ports. Place injectors and fuel rail assembly onto intake manifold. Temporarily install fuel rail-to-intake manifold bolts.
  3. Ensure injectors rotate smoothly. If injectors do not rotate smoothly, "O" rings were installed incorrectly and may be pinched. Replace "O" rings. Position injector connectors upward. Connect injector connectors. Injector connectors for cylinders No. 1, 3 and 5 are Dark Gray, and for cylinders No. 2, 4 and 6 are Brown.
  4. Tighten fuel rail mounting bolts to specification. See TORQUE SPECIFICATIONS . Install fuel pressure pulsation damper and gaskets. See FUEL PRESSURE PULSATION DAMPER . To complete installation, reverse removal procedure.
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