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Fuel Rails & Fuel Injectors: Installation

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Toyota Tundra, 2002 Toyota Tacoma, 2002 Toyota Sienna, 2002 Toyota Sequoia, and 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
  1. To install, reverse removal procedure using NEW grommets, insulators, "O" rings and gaskets. Coat "O" rings with gasoline before installing "O" rings on fuel injector. Coat fuel rail-to-fuel injector "O" ring area with gasoline before installing fuel injector on fuel rail.
  2. Use twisting motion when installing fuel injector on fuel rail. Coat intake manifold-to-fuel injector "O" ring area with gasoline before installing fuel injectors and fuel rails. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  3. Ensure spacers are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold with all fuel rail-to-intake manifold bolts and fuel line-to-intake manifold clamp bolt loosely installed.
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Tighten fuel rail-to-intake manifold bolts to specification and then tighten fuel line-to-intake manifold clamp bolt to specification. See TORQUE SPECIFICATIONS .
  6. To install remaining components, reverse removal procedure. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONS . Fill cooling system.
  7. Apply light coat of engine oil on tip of pipe on fuel filter to allow for ease of disconnect fitting and No. 1 fuel pipe installation. Using NEW retainer, install No. 1 fuel pipe on fuel filter until "click" sound is heard. DO NOT reuse old retainer when installing No. 1 fuel pipe on fuel filter. Always use a NEW retainer. Pull on No. 1 fuel pipe to ensure fuel pipe is properly locked on fuel filter.
  8. Reinstall fuel pipe clamp until "click" sound is heard. Pull upward on fuel pipe clamp to ensure fuel pipe clamp is securely locked on fuel filter.
  9. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.


  1. To install, reverse removal procedure using NEW grommets, insulators, "O" rings and gaskets. Coat "O" ring(s) with gasoline before installing "O" ring(s) on fuel injector. Coat fuel rail-to-fuel injector "O" ring area with gasoline before installing fuel injector on fuel rail.
  2. Use twisting motion when installing fuel injector on fuel rail. On Highlander, coat intake manifold-to-fuel injector "O" ring area with gasoline before installing fuel injectors and fuel rails. On all models, ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  3. Ensure spacers are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold with all fuel rail-to-intake manifold bolts and No. 1 fuel pipe-to-intake manifold clamp bolt loosely installed.
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Tighten fuel rail-to-intake manifold bolts to specification and then tighten No. 1 fuel pipe-to-intake manifold clamp bolt to specification. See TORQUE SPECIFICATIONS .
  6. To install remaining components, reverse removal procedure. Use NEW gaskets when installing No. 1 fuel pipe, fuel pulsation damper and No. 1 fuel pipe-to-fuel rail bolt on end of fuel rails. Tighten fuel pulsation damper, No. 1 fuel pipe-to-fuel rail bolt to specification and all bolts/nuts to specification. See TORQUE SPECIFICATIONS .
  7. Fill cooling system. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.
    NOTE: On Camry, it may be possible that power sun roof may not operate properly if battery is disconnected and reconnected, or battery is discharged and recharged. If power sun roof does not operate properly, perform power sun roof reinitialization procedure. See POWER SUN ROOF REINITIALIZATION PROCEDURE  under PROGRAMMING.


  1. To install, reverse removal procedure using NEW grommet and "O" ring on each fuel injector. Coat "O" ring with gasoline before installing "O" ring on fuel injector. Using twisting motion, install fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  2. Ensure spacers and NEW insulators are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold. Loosely install fuel rail-to-intake manifold nuts. Using NEW gaskets, install front fuel pipe and front fuel pipe-to-fuel rail union bolts on front of both fuel rails. Install front fuel pipe clamp bolt in clamp at center of front fuel pipe. Tighten front fuel pipe-to-fuel rail union bolts and front fuel pipe clamp bolt to specification. See TORQUE SPECIFICATIONS .
  3. Install clamp and fuel return pipe-to-fuel rail clamp bolt on rear of driver's side fuel rail. Tighten fuel return pipe-to-fuel rail clamp bolt to specification. See TORQUE SPECIFICATIONS .
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Tighten fuel rail-to-intake manifold nuts to specification. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure. Use NEW gaskets when installing fuel pulsation damper. Tighten fuel pulsation damper by hand and then tighten to specification. See TORQUE SPECIFICATIONS .
  6. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.
    Fig 1: Exploded View Of Fuel Rails & Components (Land Cruiser)
    G98D11935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommet and "O" ring on each fuel injector. Coat "O" ring with gasoline before installing "O" ring on fuel injector. Using twisting motion, install fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  2. Ensure spacers and NEW insulators are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold. Loosely install fuel rail-to-intake manifold nuts. Using NEW gaskets, install front fuel pipe and front fuel pipe-to-fuel rail union bolts on front of both fuel rails. Install front fuel pipe clamp bolt in clamp at center of front fuel pipe. Tighten front fuel pipe-to-fuel rail union bolts and front fuel pipe clamp bolt to specification. See TORQUE SPECIFICATIONS .
  3. Install clamp and fuel return pipe-to-fuel rail clamp bolt on rear of driver's side fuel rail. Tighten fuel return pipe-to-fuel rail clamp bolt to specification. See TORQUE SPECIFICATIONS .
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Tighten fuel rail-to-intake manifold nuts to specification. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure. Use NEW gaskets when installing fuel pulsation damper. Tighten fuel pulsation damper by hand and then tighten to specification. See TORQUE SPECIFICATIONS .
  6. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.
    Fig 1: Exploded View Of Fuel Rails & Components (Sequoia & Tundra 4.7L)
    G00032727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets, insulators, "O" rings and gaskets. Coat "O" rings with gasoline before installing "O" rings on fuel injector. Coat fuel rail-to-fuel injector "O" ring area with gasoline before installing fuel injector on fuel rail.
  2. Use twisting motion when installing fuel injector on fuel rail. Coat intake manifold-to-fuel injector "O" ring area with gasoline before installing fuel injectors and fuel rails. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  3. Ensure spacers are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold with all fuel rail-to-intake manifold bolts and fuel line-to-intake manifold clamp bolt loosely installed.
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Tighten fuel rail-to-intake manifold bolts to specification and then tighten fuel line-to-intake manifold clamp bolt to specification. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure. Tighten bolts/nuts and windshield wiper arm nuts to specification. See TORQUE SPECIFICATIONS .
    6. CAUTION: DO NOT reuse old retainer when installing No. 1 fuel pipe on fuel pipe fitting. Always use a NEW retainer.
  6. Apply light coat of engine oil on tip of fuel pipe fitting to allow for ease of disconnect fitting and No. 1 fuel pipe installation. Using NEW retainer, install No. 1 fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse old retainer. Pull on No. 1 fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  7. Reinstall fuel pipe clamp until "click" sound is heard. Pull upward on fuel pipe clamp to ensure fuel pipe clamp is securely locked on fuel pipe fitting.
  8. Fill cooling system. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.
    NOTE: It may be possible that power sliding doors may not operate properly after battery was disconnected. It may be necessary to perform power sliding door reinitialization procedure to obtain proper sliding door operation. See POWER SLIDING DOOR REINITIALIZATION PROCEDURE  under PROGRAMMING.


  1. To install, reverse removal procedure using NEW insulators, "O" rings and gaskets. Coat "O" rings with gasoline before installing "O" rings on fuel injector or fuel pressure regulator.
  2. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail.
  3. Coat intake manifold-to-fuel injector "O" ring area with gasoline before installing fuel injectors and fuel rails. Ensure 4 spacers are installed on intake manifold. Install fuel rails with fuel injectors on intake manifold. Loosely install fuel rail-to-intake manifold bolts.
  4. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  5. Ensure electrical connector on each fuel injector is facing toward outside of fuel rail. Install fuel crossover pipe with gaskets and union bolts on front of fuel rails. Tighten fuel crossover pipe union bolts and then fuel rail-to-intake manifold bolts to specification. See TORQUE SPECIFICATIONS .
  6. Install fuel inlet pipe with gaskets and union bolt on rear of fuel rail. Loosely install fuel inlet pipe-to-intake manifold clamp bolt. Tighten fuel inlet pipe-to-intake manifold clamp bolt and then fuel inlet pipe-to-fuel rail union bolt to specification. See TORQUE SPECIFICATIONS .
  7. To install remaining components, reverse removal procedure. Tighten bolt/nuts to specification. See TORQUE SPECIFICATIONS . Ensure fuel pressure regulator rotates smoothly in fuel rail after installation to verify proper installation "O" ring. If fuel pressure regulator fails to rotate smoothly, check for improper "O" ring installation.
  8. Fill cooling system. Install negative battery cable. Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.
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