The main function of a fuel filter is to filter out, or trap, debris particles and/or contaminants from flowing fuel. Fuel filters are a common addition to automotive engines, where they are placed in varied locations between a car's fuel tank and its carburetor or fuel injection system. Fuel filters ensure that gasoline entering a car's engine is as clean and pure as possible.
Fuel filters come in a variety of different shapes and sizes. Most fuel filters are made up of special heat-resistant paper mesh encapsulated by a metal or plastic housing. A standard fuel filter will have two openings to accommodate the fuel line itself - both an incoming slot and an outgoing slot. A nut or washer is used to secure the fuel line to the fuel filter openings.
A dirty or clogged fuel filter can cause poor vehicle performance or prevent a vehicle from being started. If the debris particles clogging the fuel filter are large enough or numerous enough, the flow of gasoline can be stopped, which will prevent a car from starting.
Regular replacement of fuel filters are mandatory to ensure proper vehicle performance. Most car manufacturers will specify guidelines as to proper fuel filter replacement intervals. Regular service of a vehicle's fuel filters should be part of basic, routine vehicle maintenance.
