2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Fuel Pump: Reassembly

  1. INSTALL FUEL PUMP ASSEMBLY 
    1. Apply gasoline to a new O-ring. Then install the CD-ring and fuel pump spacer to the fuel pump assembly
      Fig 1: Identifying O-Ring And Fuel Pump Spacer
      G05750068Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Engage the 5 claws on the fuel filter and install the fuel pump assembly to the pump filter.
    NOTE:
    • Make sure that the O-ring is not cut or pinched during the installation.
    • Attach the claws securely.
      • Fig 2: Locating Fuel Pump With Pump Filter
      G04948041Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSTALL NO. 1 FUEL SUCTION SUPPORT 
    1. Install the No. 1 fuel suction support to the fuel filter
    Fig 3: Locating Fuel Suction Support
    G05750072Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTALL FUEL PUMP HARNESS 
    1. Connect the fuel pump connector to the fuel pump assembly.
    Fig 4: Locating Fuel Pump Connector
    G05750065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. TEMPORARILY INSTALL JET PUMP 
    1. Apply gasoline to a new O-ring and install it to the jet pump.
    2. Temporarily install the jet pump to the No.1 fuel sub-tank
    Fig 5: Identifying O-Ring And Jet Pump
    G04947958Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSTALL FUEL FILTER 
    1. Temporarily install fuel filter
      NOTE: When temporarily installing the fuel filter, pass the tube under the protrusion at the top of the fuel filter as shown in the illustration.
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.

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