OEM 2009 Mercury Mariner Fuel Rail

2009 Mercury Mariner Fuel Rail Parts Questions & Experts Answers

• Q: How to service the fuel rail safely and effectively on 2009 Mercury Mariner?

  A: Safety should be your highest priority before serving the fuel rail because highly flammable mixtures exist in the fuel components so stay away from open flames and smoking near the area. Clearing the fuel system pressure first will stop fuel spray accidents and cleaning all fuel residue from beneath the engine stops autoignitions during its operation. All work on evaporative emission system components and fuel-related parts must begin with disconnecting the ground cable of the battery. To commence the removal process begin by venting the fuel pressure then disconnect the battery ground cable followed by taking off the fuel supply tube from the fuel quick connect coupling. The next step requires workers to disconnect four fuel injector electrical connectors after which they should remove the nut to position the radio capacitor aside followed by detaching the two pin-type wire harness retainers from the fuel rail then they need to remove the two fuel rail stud bolts. Take the fuel rail assembly together with injectors out of the way followed by discarding and removing the eight fuel injector O-ring seals. To install the unit use brand new seals made from fuel-resistant materials which should replace all old seals. New O-rings require engine oil lubrication before you use them to attach four fuel injectors along with their retainer clips onto the fuel rail. Fitting the fuel rail and its injectors together as an assembly requires securing it with 23 Nm (17 lb-ft) torque setting on the two fuel rail stud bolts. You should reinstall the fuel rail and injectors as an assembly immediately before tightening the two screw-type wire harness retainers onto the fuel rail. Then position the radio capacitor and fasten the nut to 10 Nm (89 lb-in). Complete the repair process by attaching battery ground cable along with the electrical connectors of four fuel injectors and by fastening the fuel supply tube to the fuel rail quick connect coupling.