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Home >> Subaru >> 2009 >> Impreza WRX STi >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (STI) >> Throttle Body >> Removal

Throttle Body: Removal

  1. Set the vehicle on a lift.
  2. Disconnect the ground cable from battery.
    Fig 1: Identifying Battery Ground Cable
    G05019586Courtesy of SUBARU OF AMERICA, INC.
  3. Lift up the vehicle.
  4. Remove the under cover.
  5. Drain approximately 3.0 l  (3.2 US qt, 2.6 lmp qt) of coolant. Ref. to DRAINING OF ENGINE COOLANT , REPLACEMENT, Engine Coolant.
  6. Remove the intercooler. Ref. to REMOVAL , Intercooler.
  7. Disconnect the connector from the throttle position sensor (A), and the manifold pressure sensor (B).
    Fig 2: Identifying Throttle Position Sensor Connector And Manifold Pressure Sensor Connector
    G06344543Courtesy of SUBARU OF AMERICA, INC.
  8. Disconnect the engine coolant hose from throttle body.
    Fig 3: Locating Engine Coolant Hose
    G06344544Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the bolts which secure the throttle body to the intake manifold and remove the throttle body.