Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

FUEL INJECTOR (for Direct Injection): Installation

INSTALL FUEL INJECTOR SEAL
1. Apply engine conditioner to the clean area shown in the illustration Using a piece of cloth, clean carbon deposits from the fuel injector assembly and its grooves.
  NOTE:
  - Do not clean the tip of the fuel injector assembly.
    
    Fig 1: Identifying Fuel Injector Clean Area
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - Do not use a wire brush to clean the fuel injector assembly.
  - If a fuel injector assembly is dropped or the tip of a fuel injector assembly is struck, replace it with a new one.
2. Apply engine oil to the fuel injector assembly contact surface of SST (guide). Then attach SST (guide) to the fuel injector assembly with the tapered inner portion facing the tip of the fuel injector assembly as shown in the illustration
  SST 09260-39015 (09268-03020)
  
  Fig 2: Identifying Fuel Injector Assembly With Tapered Inner Portion
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Install a new fuel injector seal to SST (holder).
  SST 09260-39015 (09268-03010)
  
  NOTE: Be careful not to install the fuel injector seal to SST (holder) at an angle. Doing so will stretch the seal and correcting this problem is very complicated.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.