How to Replace a Fuel Rail

The fuel rail delivers fuel to the fuel injector of the car’s engine. If the fuel rail becomes faulty or damaged, it will need to be replaced. You should consult a car repair manual for further details on replacing the fuel rail for your specific car. There is also some useful general advice which will allow you to properly replace a faulty rail without too much trouble.

Tools and Materials Needed:

  • New Fuel Rail
  • Set of Wrenches
  • Screwdrivers
  • Car Repair Manual

Step 1 – Obtain the Necessary Tools and Materials

Your local auto repair store should provide you with everything that you need. You will need to find a fuel rail which is compatible with your particular engine. You may find it easier to get this on the Internet. You can also save a lot of time by buying a car repair manual specifically for your car. This will make the process of replacing fuel line easier to understand and more specific to your particular car.

Step 2 – Remove the Fuel Pump Fuse

Refer to the owner’s handbook to find out where the fuse box is in your car. The fuse which controls the electronic control module or the fuel pump will need to be removed. This will allow you to do depressurize the car’s fuel system.

Step 2 – Depressurize the Car’s Fuel System

When you remove the fuse, you simply start the engine of the car, and after a few minutes, the engine will stall. When it stalls, the fuel system will be fully depressurized.

Step 3 – Remove the Necessary Components

You will need to disconnect the car battery, removing the negative terminal. You will also need to remove the air cleaner assembly, including the tubing, the filter and the air box. Remove the injector connectors as well, using a flathead screwdriver to unplug the connectors. You can achieve this by prying the clips loose and removing the collector from the fuel injector. You should also remove the vacuum hose as well as the fuel return hose. Finally, remove any ground wires and cables to the intake manifold.

Step 4 – Disconnect the Fuel Lines and Remove the Fuel Rail

Disconnect the lines for the fuel rail. Remove the old fuel rail by removing the bolt that mounts it in place, securing it to the entire assembly. You should also remove the objectors from the mount.

Step 5 – Install the New Fuel Rail

The screws which you removed before should now be attached to the injectors on the new fuel line. Reinstall the new fuel rail using the mounting bolts to fix it to the fuel rail mount. To complete the job, follow the previous steps in reverse, simply reversing the process that you used to remove the old fuel line. When the new fuel rail is installed, be sure to replace the fuse in the fuse box, and then start the car to see that everything works properly.