OEM 2008 Buick Lucerne Fuel Rail

2008 Buick Lucerne Fuel Rail Parts and Q&A

• Q: How to replace the fuel rail assembly on 2008 Buick Lucerne?

  A: A proper replacement of the Fuel Rail assembly starts with applying fuel pressure relief through either ch 48027 (With) or (Without CH 48027. When replacing the Fuel Rail, disconnected fuel feed pipe quick connect fitting at the Fuel Rail then remove positive crankcase ventilation tube from intake duct and Intake Manifold followed by disconnecting Spark Plug Wires from ignition coils. The replacement process starts by disconnection of electrical engine harness connectors from throttle actuator, engine coolant temperature (ECT) sensor, ignition control module wiring harness, manifold absolute pressure (MAP) sensor, fuel injectors, exhaust gas recirculation (EGR) valve, evaporative emission (EVAP) solenoid, and heated oxygen sensor (HO2S) pigtail. The rear engine harness retainers must be removed from around the Fuel Rail and the engine harness branches need to be gathered together before the Fuel Rail can be unfastened with its nuts. Caretfully raise the Fuel Rail through balanced pressure on both rail sides. When substituting the Fuel Rail discard the Fuel Injector retainers as well as the fuel injectors but dispose of the upper o-ring and lower o-ring seals. Application requires injecting engine oil onto new o-ring seals followed by installing them onto fuel injectors while setting the retainer components. Before installation place a lubricant on the lower o-ring seals followed by rail positioning and injector seating. Fasten the Fuel Rail nuts by applying torque of 10 n.m (89 lb in) pattern. The Fuel Rail harness must rest over the engine while retainers need to attach to the Fuel Rail before connecting electrical connectors to fuel injectors and ho2s pigtail among other components in a specific order. The last installation steps should begin with reinstallation of the spark plug wire retainer followed by connecting Spark Plug Wires to ignition coils before installing the pcv tube and reconnecting the fuel feed pipe via its quick connect fitting. Apply the negative Battery Cable before checking for leaks while turning on and off ignition then install the Intake Manifold cover.