Safety measures are essential for fuel rail maintenance since the system contains highly volatile fuel combinations; therefore stay clear of smoking or igniting flames. It is essential to purge the fuel system of pressure before unconnecting all fuel components and tubing because fuel pressure levels stay strong during engine idle. You must first drain fuel pressure while you remove the ground connection from the battery. You should blow compressed air through the connector retaining clip area to remove debris before breaking the locking tabs when you plan on using the same liquid or vapor tube connectors. Press the locking tab on the fuel tube to fuel rail quick release coupling to open the first position and activate the secondary locking device by squeezing it to disable the locking mechanism. The locking mechanism needs pushing outward so you can disconnect the fuel rail pressure and temperature vacuum tube and electrical connector and the four
Fuel Injector electrical connectors. The two fuel rail bolts need removal before you unfasten the wiring retainers connected to the fuel rail. The fuel rail assembly should be lifted out with the injectors while maintaining the correct order. Spacers are also removed after the assembly. Dispose the eight fuel injector O-ring seals after their removal. The installation requires new fuel-resistant O-ring seals because regular O-rings can create leaks therefore avoid reusing old seals. Clean engine oil should be used for lubricating new O-rings before installing fuel injectors alongside retainer clips. First position the fuel rail spacers then place the fuel rail assembly with bolts attached onto the spacers. Afterward, install the wiring retainers into position and tighten them until they reach 23 Nm (17 lb-ft). Connect the fuel injector electrical connectors and the fuel rail pressure and temperature vacuum tube while also attaching its electrical connector. The first step involves extending the collar from the fuel tube fully into the quick release coupling before using the tang to lock it down. Before installing the fuel tube apply a drop of clean engine oil at its end. Connect the fuel tube quick release coupling while confirming that both quick lock coupling locks into position and the locking tangs remain in place; perform a pulling operation to verify full engagement. Reconnect the battery ground cable as a last step.