Question about 2008 Ford F 450 Super Duty

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Have a F450 changed both fuel filters. went to wash my hands and an employee started the truck without perging the lines . Truck would start now.Do I have to bleed injectors? What do I do next.

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Fill the top filter housing full of fuel and and turn the key on and off a few time to let the fuel pump pressurize, then try and start not cranking for more then 10 seconds then waiting a minute. i will bleed out the air thrn.

Posted on Oct 01, 2010

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Hello there, here are a few key notes to assist you:
  • Open the hood for access to the engine compartment. Depressurize the fuel line by pulling the fuel pump relay. The relay is located in the fuse panel under the hood behind the battery.
  • Start the truck and allow it to stall. The fuel system is depressurized. Insert the relay back into the fuse panel.
  • Locate the fuel filter by tracing the fuel lines coming out of the fuel tank. The filter will be located a foot from the tank under the truck on the driver side.
  • Unscrew the inlet and outlet lines by loosening the fuel line with a line wrench. Hold the filter in place by holding the nut on the filter with a second line wrench.
  • Pull the filter out of the mounting bracket by sliding it out and away from the bracket.
  • Slide the new filter into the mounting bracket. Ensure the arrow on the filter is pointing toward the front of the truck, as it designates the direction of fuel flow.
  • Screw the inlet and outlet lines onto the filter by hand. Tighten with a line wrench. Use a second line wrench to hold the filter still while tightening.
  • Start the truck by turning the ignition to the "Start" position. Hold the key in this position for two seconds to allow the fuel pump to push fuel through the lines. Repeat this until the truck starts.
  • Allow the truck to idle while inspecting the filter for any leaks. Inspect around the filter and the fuel lines.
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You need to install an electric fuel pump to lift the fuel from the tank to the mechanical pump. You can turn off the electric pump after starting or use it when bleeding the lines after changing the fuel filter. You can start the truck after a few minutes instead of a few days. I know from experience and fought that problem for years.

Dennis.

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