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HOMESERVICE MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 367 (ENGINE CONTROL SYSTEM)KNOCK SENSOR, INTAKE MANIFOLD (3MZ-FE)REPLACEMENT
2004 Toyota Celica GT, Standard

Knock Sensor, Intake Manifold (3MZ-FE): Replacement

2004 Toyota Celica GT, StandardSECTION Replacement
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.
  1. DISCHARGE FUEL SYSTEM PRESSURE (See  FUEL SYSTEM (3MZ-FE)  ) 
  2. DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL) 
  3. DRAIN ENGINE COOLANT (See  ENGINE COOLANT (3MZ-FE)  ) 
  4. REMOVE FRONT SUSPENSION UPPER BRACE CENTER (W/O TEMS) (See  REPLACEMENT  ) 
  5. REMOVE V-BANK COVER SUB-ASSY (See  REPLACEMENT  ) 
  6. REMOVE AIR CLEANER CAP SUB-ASSY (See  REPLACEMENT  ) 
  7. REMOVE EMISSION CONTROL VALVE SET (See  FUEL INJECTOR ASSY (3MZ-FE)  ) 
  8. REMOVE INTAKE AIR SURGE TANK (See  FUEL INJECTOR ASSY (3MZ-FE)  ) 
  9. REMOVE ENGINE MOVING CONTROL ROD 
    1. Remove the pipe from the clamp.
    2. Remove the 4 bolts, then remove the engine moving control rod and setting condenser
    Fig 1: Removing Engine Moving Control Rod
    G00960245Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE INTAKE MANIFOLD 
    1. Disconnect the fuel pipe No. 1
      1. Remove the fuel pipe clamp.
      2. Pinch the tube connector, then pull out the fuel pipe No. 1
      NOTE:
      • Check around the quick connector for dirt or mud before this operation. Remove the dirt if necessary.
      • Be careful of mud because the quick connector has an O-ring which seals the pipe and quick connector that can be contaminated.
      • Do not use any tools in this operation.
      • Do not bend or twist the nylon tube. Protect the quick connector by covering it with a vinyl or plastic bag
      • When the pipe and quick connector are stuck, push and pull the quick connector to release and pull the quick connector out carefully.
RENDER: 1.0x

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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.