Fuel System Pressure Release: Diamante
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Mitsubishi Outlander, 2003 Mitsubishi Montero Sport, 2003 Mitsubishi Montero, 2003 Mitsubishi Lancer, and 2003 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.
Remove rear seat cushion and remove access plate to gain access to fuel pump harness connector. See Fig 1 and Fig 2 . Disconnect fuel pump harness connector. Start engine. Allow engine to operate until it stalls. Turn ignition off. Reconnect fuel pump harness connector after repairs are completed. Reinstall access plate and rear seat cushion.