Step 1 : Relieving the pressure in your fuel line involves running a vehicle without the fuel pump for a short period of time. Relieving that pressure is an important safety concern before attempting this kind of a job. Your fuel lines are under pressure which is necessary to spray the fuel into the combustion chamber of your vehicle in the correct amount at the right time. It's a little more complicated to change a diesel fuel filter and also a little more dangerous.Īssuming that you do have a typical gasoline powered engine, the first thing you want to do before getting in there to replace a dirty fuel filter is to relieve pressure in your fuel system itself. If you are driving a diesel engine, then the process is actually quite a bit different. One thing to keep in mind is that when we talk about changing your fuel filter, we are assuming that you have a typical gasoline powered engine. It is one of those maintenance items that usually gets skipped due to lack of awareness of level of difficulty to service due to the added labor and material cost, but definitely worth changing if you plan on keeping your car for a long time.Changing your own fuel filter is not that difficult a task and will definitely save you a bit of cash. Changing your fuel filter also greatly extends the life of the fuel pump as it won’t have to struggle against a clogged filter burning itself up in the process. This causes your engine to burn more fuel and reduces your fuel economy. The computer will compensate by commanding your injectors to stay open longer to compensate for the inadequate fuel pressure. Then the oxygen sensor will detect that there isn’t the right amount of fuel burned. As stated before, a clogged fuel filter can lower fuel pressure causing your injectors to not discharge the exact amount of atomized fuel. Especially during highway driving where the engine will benefit from steady constant fuel pressure. Once we diagnose and change the fuel filter our customers remark that their fuel economy has gone way up. Symptoms of a clogged fuel filter can manifest as hard starting, low engine power, loud fuel pump, poor idle, and terrible gas mileage. Why changing your fuel filter is important Due to these added costs many people decline having their fuel filter serviced until there is a problem. Even newer cars from Toyota, Honda, and Chevrolet made in the last 10 years now have their fuel filters built into the car’s fuel pump assembly inside the gas tank which may require removing the gas tank if there is no fuel pump service panel. This requires experience, can be time consuming, and adds parts costs to the repair. So the solution is to cut the steel fuel line and replace part of the rusty line with new fittings to screw in a new fuel filter. Normally a gas torch would be used to separate rusty bolts, but you can’t use that because of the fuel in the lines. This made them much harder to change as New York cars deal with a lot of road salt in the winters, which causes corrosion that rusts the steel line to the filter. As modern cars made more power and required higher fuel pressures the fuel filter designs changed and now use special metal fittings to screw metal fuel lines into the fuel filters. Usually fuel filters are found under the car running along side a frame rail Why Fuel Filters don’t get changed oftenįuel filters used to be easily accessible in older cars from the 80’s, and 90’s, held in with plastic clips or clamps along the fuel lines under the car.
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