OEM 2005 Buick Century Fuel Rail

2005 Buick Century Fuel Rail Parts Questions & Experts Answers

• Q: How to replace the fuel rail assembly on 2005 Buick Century?

  A: The eight-digit identification number on the left-hand Fuel Rail should be documented before replacement because it serves even cylinders 2, 4, and 6. It is crucial to mount fuel injector o-rings properly because the upper position goes to the black o-ring while the lower position belongs to the brown one since they have different materials though they maintain the same size. Football caps should cover the fittings while plugging holes to stop contaminated fluids from entering the system. Disconnection of the car's negative battery cable must be done first followed by lowering fuel system pressure. The proper service begins with disassembly of the upper Intake Manifold along with the fuel pipe retainer clip bolt and the engine fuel feed pipe from the Fuel Rail and the engine fuel return pipe from the Fuel Pressure Regulator. Disconnect the main fuel injector wiring harness connector before performing these procedures: removing the fuel feed and return pipe o-rings and pulling up the lock release of the fuel injector electrical connectors. First detach the wiring harness from the Fuel Rail before removing the Fuel Rail bolts to take off the assembly. Damage to any injector o-ring seals requires them to be discarded. During installation handle all fuel system components carefully while you slow contaminants from entering through plugging the Fuel Rail inlet and outlet ports. It is necessary to prevent both compressed air usage along with submerging the Fuel Rail assembly in solvent solutions. To install the new Fuel Injector O-Ring seals on each injector's spray tip end first grease them with clean engine oil and then put them into the Intake Manifold through its fitting angular position. Tighten the Fuel Rail bolts to 10 n.m (89 lb in) before restoring the ect sensor electrical connector and installing the fuel injector wiring harness with electrical connectors where the slide lock should be fully engaged. The procedure for this fix requires users to install new o-rings onto the fuel feed and return pipes before attaching the fuel feed pipe to the Fuel Rail with a torque setting of 17 n.m (13 lb ft). The fuel return pipe joins the Fuel Pressure Regulator after tightening its nut to 17 n.m (13 lb ft). Then install and tighten the fuel pipe retainer clip bolt to 25 n.m (18 lb ft). Fundamentally install the upper Intake Manifold before reattaching the negative battery cable and examine for fuel leakage through a testing sequence of 2-second ignition on and 10-second off intervals.