OEM Mercury Fuel Rail

Mercury Fuel Rail Parts Questions & Experts Answers

• Fuel Rail
  1W7Z-9F792-AA
  Q: How to service the fuel rail safely and effectively on Mercury Grand Marquis?

  A: Maintenance of fuel rail starts with fuel-related safety procedures as flammable mixtures exist within the system. The service begins with disconnection of the battery ground wire followed by fuel pressure reduction before work can start. The procedure for upkeep requires teaming up with the fuel lines and extracting the throttle body alongside the EGR valve and exhaust manifold tube. To proceed you should detach the drive belt then disconnect the main fuel shut-off solenoid connector and the generator cable and electrical connector along with the harness pin-type retainer. Use tools to dismantle and remove the bolts keeping the generator bracket secure together with any other relevant bolts. The accelerator cable and speed control actuator cable need to be unclipped from the crash brackets before the LH heated oxygen sensor and transmission electrical connector are separated from the bracket at the cylinder head rear. Detach the crash bracket pin-type fuel charging wiring retainer while removing the wiring bracket and disconnect its wiring connectors. First disconnect the transmission harness from the stud then take off the bracket by removing its nut and bolt and disconnect the vacuum lines. Detach the crash bracket by starting with a bolt then a stud removal. Next disconnect the ground connector from the rear right stud followed by the generator harness locator retainer from the left front stud. The EGR vacuum regulator solenoid and the Evaporative Emission (EVAP) canister purge valve along with the crankcase ventilation tube and the eight fuel injector electrical connectors need to be taken off. Disassembling begins with removing four studs to extract the fuel injection supply manifold together with its fuel injectors as one component. The installation process requires engine oil lubrication of the fuel injector pockets while using new O-rings crafted from specific fuel-resistant material instead of repeating the use of old O-rings. The fuel injection supply manifold along with fuel injectors must be installed together before torquing the manifold studs to manufacturer specifications. After reinstalling the crash bracket and its components together with the bolt and stud install connections for the EGR vacuum regulator solenoid to run between the evaporative emission canister purge valve and the crankcase ventilation tube. The next steps include connecting the eight fuel injector electrical connectors across the fuel supply retaining bracket while reattaching the wiring connectors. Begin with installing the retainer at the stud position before adding the nut and bolt while adding the LH heated oxygen sensor connector and finally fastening the fuel charging pin-type retainer at the crash bracket for completion. The accelerator cable and speed control actuator cable must have their clips installed onto the crash brackets before installing bolts to mount the generator bracket while tightening bolts. The ground connector should be connected to the RH rear stud while attaching the generator harness location retainer to the LH front stud. Installation of the drive belt and EGR valve exhaust manifold tube and throttle body assembly will proceed after reattaching the fuel lines which are followed by battery ground cable connection.
• Fuel Rail
  4L8Z-9F792-BE
  Q: How should one service the fuel rail while ensuring safety and proper installation on Mercury Mariner?

  A: You should maintain safety when working with the fuel rail since open flames and smoking need to be entirely avoided because the rail contains explosive fuel mixtures. The first step should focus on removing system pressure since the fuel pressure stays high from engine shut-off. To begin work on the fuel rail first disconnect the battery cable before detaching the fuel supply tube quick connect coupling installation at the fuel rail location. After disconnecting the fuel rail pressure and temperature sensor connector and vacuum tube the service proceeds with removing its four fuel injector electrical connectors. Disassemble the radio capacitor by removing its nut before separating its wire harness retainers from both the valve cover stud bolt and two fuelling rail pin-type retainers. The two fuel rail stud bolts require removal before taking out the fuel rail assembly with its injectors. The mechanics need to remove and discard eight O-ring seals which belong to fuel injector. During installation use new O-ring seals created from fuel-resistant material which need clean engine oil lubrication. The fuel rail and injectors can be reinstalled as one unit after installing both retainer clips to the four fuel injectors that must be carefully tightened with fuel rail stud bolts at 23 Nm (17 lb-ft). The installation requires reconnecting both pin-type wire harness retainers to the fuel rail while securing the wire harness retainer at the valve cover stud bolt. Position the radio capacitor before installing the nut which should be tightened to 10 Nm (89 lb-in). Repeatedly connect the four fuel injector electrical connectors and the vacuum tube and electrical connector for the fuel rail pressure and temperature sensor as well as the fuel supply tube quick connect coupling at the fuel rail, and the battery ground cable.
• Fuel Rail
  1S7Z-9F792-CA
  Q: How to service and repair the fuel rail on a returnless fuel system on Mercury Cougar?

  A: You should begin fuel rail servicing by releasing the fuel system of vehicles using returnless systems. First remove the air cleaner outlet tube together with the resonator before disconnecting the fuel supply line from the fuel injection supply manifold. Start by unclipping and removing the accelerator cable from its mounting bracket and then proceed with disconnection of the fuel pressure regulator elements which include its electrical components and vacuum routing. Vehicle speed control systems require the disconnect of speed control cables at the throttle body before pulling out the cable by pushing the retaining clip. As a next step disconnect each fuel injector electrical connector after positioning the wiring harness to one side then remove the fuel injection supply manifold. Reverse the uninstallation steps while using XO-10W30-QSP or DSP engine oil or equivalent Ford WSS-M2C-153-H specification to lubricate the lower O-ring seal. A quality new fuel injector lower O-ring seal should be installed for proper operation. Fuels and their vapors are dangerous because they easily combust at all times so handle all such components with caution to prevent personal harm.