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How to Relieve Fuel System Pressure 98-12 Ford Crown Victoria

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  1. step : Depressurizing the Fuel System (0:54)
    • Remove the drive side trunk panel and locate the inertia switch
    • Pop up the red tab with a flat blade screwdriver
    • Start the vehicle and let it run until it stalls
  2. step : Priming the Fuel System (1:46)
    • Push down the inertia switch
    • Turn the key to the run position, allowing the fuel pump to turn on and off
    • When off, turn the vehicle off
    • Repeat the process two times
    • Start the vehicle

Hi, I'm Mike from 1AAuto. We've been selling auto parts for over 30 years! We're dedicated to delivering quality auto parts, expert customer service, and fast and free shipping, all backed by our 100% satisfaction guarantee. So visit us at, your trusted source for quality auto parts.

In this video we're going to be working with our 2004 Ford Crown Victoria 4.6-liter V8. We're going to show you how to remove the pressure from your vehicle's fuel system so you can work on fuel related components safely. We're going to show you the easy way to do it with the vehicle's inertia switch, which is located in the trunk, as opposed to going through the fuse panel and having to remove your fuel pump relay.

If you like this video, please click subscribe. We have a ton more information on this and many other vehicles. If you ever need parts for your car, you can follow the link down in the description over to

To relieve the fuel system pressure in a Ford Crown Vic, as well as a variety of other Ford vehicles, you could remove the fuel pump relay. However, if you don't know where it is, or are having a hard time finding it, behind this panel on the driver side of your trunk is your inertia switch.

This is designed to shut off your fuel pump if the vehicle is in a collision or the rear gets hit. Simply pop that tab up with a small flat blade screwdriver through that access hole and it'll cut off our fuel pump. Start the vehicle and let it run until it stalls. When the vehicle stalls, the pressure in the fuel system has been relieved and we can now work on it safely without spraying gas everywhere.

Push down fully on your inertia switch to re-engage it. To prime your fuel system, turn the key to the run position without starting the car and allow the fuel pump to turn on and off. When it turns off, shut your key off. Repeat the cycle two more times and then start the vehicle.

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Tools needed for replacement:

    Screwdrivers & Related

  • Flat Blade Screwdriver

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