A: Fuel High-Pressure Hose Disconnection

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

Follow the steps below to unlock the fuel high-pressure hose connector.

Fig 1: Identifying Fuel High Pressure Hose, Retainer And Fuel Rail
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Insert a flat-tipped screwdriver [6 mm (0.24 inch) wide and 1 mm (0.04inch) thick] into the retainer of the fuel high-pressure hose connector.
  CAUTION: When pushing up the retainer of the fuel high-pressure hose connector, pay attention to avoid damage to the retainer.
  
  Fig 2: Identifying Fuel High Pressure Hose, Retainer And Fuel Rail
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. Turn the flat-tipped screwdriver inserted into the retainer by 90 degrees to push up the retainer and unlock the fuel high-pressure hose connector.
Remove the fuel high-pressure hose.

Fig 3: Removing Fuel High-Pressure Hose
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.