This is because there is not a steady flow of fuel due to a partially clogged filter. In addition to hesitation, a dirty fuel filter can cause the engine to sporadically misfire, especially when accelerating. Once you notice that your engine randomly hesitates as you step on the gas pedal, you should consider checking the fuel filter because it may have a good amount of dirt clogging it.Īny degree of blockage will prevent the normal flow of gas into the engine leading to an unusual combustion and the ultimate reduction of the vehicles power and reaction. The following clogged fuel filter symptoms will help you identify the problem quickly with the intention of saving you from a damaged fuel tank in the end. If you have lost track of both the mileage count and time passed since the last fuel filter replacement, then you should keep an eye out for the appearance of any common symptoms which may indicate that your fuel filter needs to be replaced. See Also: What Happens if Someone Puts Bleach in Your Gas Tank? Top 5 Bad Fuel Filter Symptoms For instance, GM trucks with the Duramax diesel engine need to have their fuel filters replaced every 22,500 miles for some of their newer trucks while many Ford diesel trucks have 15,000 mile change intervals. Those with diesel engines will likely need to replace their fuel filters much sooner. If for some reason you don’t have access to that, call your local dealership or simply use 60,000 miles as the change interval if you have a vehicle manufactured in the last 15 or so years. The best thing to do is follow the manufacturer’s recommendation which can usually be found in your car manual. But some manufacturers don’t specify an interval, have a very high interval (150,000 miles for Mercedes Benz), or even say the fuel filter doesn’t need replacement (such as Toyota). Most manufacturers tell you to change the fuel filter somewhere between 40,000 and 80,000. If the vehicle doesn’t get driven very often, you will still want to replace it every 2-3 years.įor modern vehicles, you can usually wait longer before replacing the fuel filter. Replacing the filter at a set mileage is the normal way to factor when to change your fuel filter.įor older cars and trucks, the recommended fuel filter replacement interval is usually between 20,000 and 40,000 miles. The replacement interval of a fuel filter is defined by the two ways: mileage and time. You’ll want to replace the filter before it reaches that stage. When it gets clogged enough, you will have a fuel flow issue. The more contaminants it traps, the less fuel can flow through. Because of this rust, the fuel can get contaminated and therefore, must be cleaned by the fuel filter.īy cleaning the fuel, the fuel filter protects the engine from the potential damage which can be caused by such contamination by making sure that the fuel that goes into the fuel pump is clean and pure.īut even the best fuel filter in the world has a limited lifespan. This rust can form due to moisture retaining of the gas tank. The debris in the fuel tank can be in different form such as rust. It works similar to how an oil filter cleans engine oil and an air filter cleans the air before it gets into the combustion chamber. The purpose of the fuel filter is to “filter” the fuel of such impurities before they reaches the pump. A fuel filter cleans the fuel of any impurities like dust particles or any form of debris present in the fuel tank that are large enough to get trapped by the fuel filter.
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