FUEL SYSTEM
| WARNING | Always relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact engine or electrical components. |
FUEL SYSTEM PRESSURE RELEASE
Remove trunk floor mat. Remove trunk trim panel. Disconnect fuel pump connector. Start and run engine until it stops. Wrap fuel line connection at fuel rail with shop towel to catch any spilled fuel. Loosen banjo bolt enough to relieve any remaining fuel pressure. Tighten banjo bolt.
FUEL PUMP
Note. Fuel filter is integrated in the fuel pump.
HEATED OXYGEN SENSOR
Note. LS400 is equipped with 4 sensors. Bank No. 1 refers to bank that includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Sensor No. 1 refers to sensor closest to engine block. Sensor No. 2 refers to sensor farthest away from engine block.
(Bank No. 1, Sensor No. 1 & Bank No. 2,Sensor No. 1)
- Heated Oxygen Sensors (HO2S) are mounted in exhaust manifolds. Vehicle must be raised and supported to access sensor.
- When removing sensor(s), ensure permanent pigtail is protected from damage.
- Remove sensor(s) from exhaust manifold(s). Avoid using cleaning solvents of any type. If engine temperature is less than 120°F (48°C), sensor(s) may be difficult to remove.
(Bank No. 1, Sensor No. 2 & Bank No. 2,Sensor No. 2)
- Heated Oxygen Sensor(s) (HO2S) is mounted in exhaust pipe(s) behind catalytic converter, toward rear of vehicle.
- Remove components as necessary to access sensor connector. (Схема №5)-6. Disconnect sensor connector. Raise and support vehicle. When removing sensor(s), ensure permanent pigtail is protected from damage.
- Remove sensor(s) from exhaust pipe. Avoid using cleaning solvents of any type. If engine temperature is less than 120°F (48°C), sensor(s) may be difficult to remove.