OEM 2004 Chevrolet Trailblazer Fuel Rail

2004 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: How to replace the fuel rail assembly on 2004 Chevrolet Trailblazer?

  A: The replacement process for Fuel Rail assembly starts with fuel system pressure relief following the fuel pressure relief procedure after which technicians can remove the Intake Manifold. The cleaning process requires a gm x-30a or equivalent engine cleaner which should be used by spraying on the Fuel Rail assembly and cylinder head without submerging the Fuel Rail in cleaning liquids. You should detach the Fuel Pressure Regulator vacuum line as well as the fuel feed and return pipes (1, 2) from the Fuel Rail and disconnect the Fuel Injector harness in-line connector. Use extreme caution when removing each of the Fuel Rail attaching bolts because this operation needs to avoid harming the spray tips and injector electrical connector terminals. Close all fittings with caps to protect from contamination as well as use plugging elements to block possible entry points. Extract the lower o-ring seal that fits the injector from all component pieces before you throw away these seals. Proceed with the installation if you will not replace the Fuel Rail. To separate the Fuel Rail start by removing both fuel injectors together with the Fuel Pressure Regulator and the injector harness. During Fuel Rail assembly you must first mount the Fuel Injector harness then add the Fuel Pressure Regulator and finally install the fuel injectors. A tiny amount of engine oil should lubricate new lower injector o-ring seals before placing them onto each injector spray tip end. Fasten the Fuel Rail assembly through its attaching bolts while tightening them to 10 n.m (89 lb in). Utilize the Fuel Rail as a starting point when you combine the fuel feed and return pipes, also attach the Fuel Injector electrical wires and Fuel Pressure Regulator vacuum line. You must reinstall the Intake Manifold followed by the connection of the negative Battery Cable. Turn the ignition switch on while keeping the engine turned off for two seconds before switching it off for ten seconds. Next, restart the turn on with the engine shut down. Use this time to search for fuel leaks.