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Home >> Chevrolet >> 2012 >> Sonic LS, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls/Fuel - 1.8L - Repair Instructions >> Repair Instructions >> Fuel Injection Fuel Rail Assembly Replacement >> Removal Procedure
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Removal Procedure

  1. Disconnect the negative cable from the battery. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the positive crankcase ventilation tube. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement .
  3. Disconnect the wiring harness from the:
    1. Evaporative emission purge valve
    2. Fuel injectors
    3. Manifold absolute pressure sensor
  4. Place a collecting basin underneath.
    5. WARNING:

    Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

  5. Release the fuel pressure. Refer to Fuel Pressure Relief .
    6. Fig 1: Fuel Feed Pipe & Evaporative Emission Canister Purge Solenoid Valve Bracket
    GM2676363Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the fuel feed pipe (1) . Refer to Plastic Collar Quick Connect Fitting Service .
  7. Install CH-807  plug to the fuel feed pipe.
  8. Remove the 2 evaporative emission canister purge solenoid valve bracket bolts (2).
  9. Relocate the evaporative emission canister purge solenoid valve and bracket.
    10. Fig 2: Multiport Fuel Injection Fuel Rail, Injectors & Bolts
    GM2506162Courtesy of GENERAL MOTORS COMPANY
  10. Remove the 2 multiport fuel injection fuel rail bolts (1).
  11. Remove the multiport fuel injection fuel rail (2) with the fuel injectors (3) from the intake manifold.
  12. Remove the 4 fuel injector seals.
    13. Fig 3: Fuel Injector Retainer
    GM2506161Courtesy of GENERAL MOTORS COMPANY
  13. Remove the fuel injector retainer (1).
  14. Remove the fuel injectors.
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