OEM Buick Century Fuel Rail

Buick Century Fuel Rail Parts Questions & Experts Answers

• Fuel Rail
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  Q: How to service the fuel rail on Buick Century?

  A: The first step to service the Fuel Rail involves carefully inspecting the left-hand Fuel Rail edition marked by eight identification digits that connects to cylinders 2, 4, and 6. Follow the o-ring installation rules because black o-rings fit above the other ones which have brown color despite their identical size. The fuel passages need protection from contaminants by covering all fittings and plugging all holes when performing maintenance. The first step requires fuel pressure reduction followed by lifting the upper manifold. You should disconnect the engine fuel feed pipe from the Fuel Rail end while also disconnecting the engine fuel return pipe from the Fuel Pressure Regulator end. Before further procedures remove both the fuel feed pipe o-ring and the fuel return pipe o-ring and disconnect the main injector harness electrical connector before pulling up the Fuel Injector connector lock release. Use your thumb to press down the Fuel Injector connector lock tab while pulling out the fuel injection harness from the Fuel Rail. Proceed to disconnect the electrical wiring of coolant temperature sensor while you remove the Fuel Rail retaining bolts. Lift all fuel injectors using the specific tool (J43013) to remove the Fuel Rail assembly. Every injector o-ring seal from its position at the spray tip section goes into disposal yet the o-ring back up stays intact for reuse. The Fuel Rail assembly requires tilting to position the injectors before bolt attachment to install with torques set to 10 n.m (7 lb ft). The coolant temperature sensor wiring must be hooked up before reattaching the injector wiring harness to the Fuel Rail followed by a proper lock of the injectors by pushing the slide lock into position. After connecting the main injector harness electrical connector you should install new o-rings on the fuel feed pipe and fuel return pipe followed by reinstalling the fuel feed pipe to the Fuel Rail while tightening the engine fuel feed pipe nut to 17 n.m (13 lb ft). Install the upper Intake Manifold while tightening the fuel filler cap then connect the fuel return pipe to the Fuel Pressure Regulator before securing the engine fuel return pipe nut to 17 n.m (13 lb ft). The maintenance process ends by connecting the negative Battery Cable before a leak inspection by turning the ignition on for two seconds followed by off for ten seconds and another lift of on to check for fuel leaks.