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How to Replace Fuel Hoses

Preparing Your Car for a Fuel Hose Change

Now it's time to get ready for the fuel hose swap. You'll need to get underneath the vehicle for this part of the job, so start by safely lifting the vehicle using a floor jack and secure it using jack stands. Never crawl underneath a car supported only by a jack.

Once you're safely underneath, locate your car's fuel lines and its fuel filter. The filter is most likely in the engine bay under the hood, but it can also be in the rear of the vehicle near the gas tank. The fuel filter is a hard, cylindrical part and the fuel hoses are the tubes that run into it. If you're not positive that what you're looking at is your fuel filter, it may be a good idea to consult your auto maintenance repair manual or ask a vehicle maintenance technician just to be safe.

This next step is crucial -- you must relieve the pressure in your fuel system. Most cars today use fuel injection, which sprays fuel into the combustion chamber at incredibly high pressures. If you do not relieve this pressure when you start removing the fuel hoses from the filter, gasoline will spray everywhere.

To relieve the fuel pressure, you'll need to find your car's fuse box. Using the manual once again, locate the fuel pump fuse or relay. Start the car, and while the engine is running, pull that fuse (or relay) out. If you did this correctly, the engine will shut off within a few seconds, and the fuel system will no longer be pressurized.

Finally, to avoid any chance of an electric spark as you work on the fuel hoses, disconnect and isolate the negative terminal on your car's battery. In addition, it's not a bad idea to change the fuel filter while you're at it. You can learn how to do that here.

Up next, we're going to remove the old fuel hoses.