![]() ![]() This is often undertaken as part of your routine service schedule. The intervals on modern fuel filters vary widely between makes and models with changes expected between 30,000 and 100,000 miles. Older and classic vehicles will need filter replacement more frequently from every 2 years and 20,000 miles. An inspection will be required to determine if this is the cause.įuel filters are notoriously hardy components but they will need replacing eventually. Most modern fuel pumps are electronically driven and contain many moving parts that will eventually succumb to wear. If this stream is disrupted the engine will not function correctly. The fuel pump is designed to move a consistent stream of fuel from the tank to the engine. ![]() (check the warning lights page in your handbook if you are unsure of the symbol) Fuel Pump FailureĪny of the symptoms above could also be signs of a failing fuel pump. This may be an engine management light or a specific fuel filter light. Some vehicles will have a fuel pressure sensor that will illuminate a yellow warning light on your dashboard. The excess fuel will make your engine run rich and reduce MPG. This incorrect mix of fuel can severely hinder performance making the vehicle sluggish on acceleration and have trouble maintaining a consistent speed. Your ECU and fuel pump overcompensate with more fuel when the filter is clogged. At this stage, the fuel filter will need to be replaced soon to avoid further inconvenience. When a fuel filter is seriously clogged it may restrict the fuel so much it stalls just after ignition or when out on the road. These symptoms would include misfires and splutter at idle or while driving. You may notice it does not sound as smooth as a properly functioning engine. The rev counter will be rising and falling as the engine struggles to maintain a steady rate of rotation. Rough IdleĪ rough idle occurs when the delicate mixture of fuel and air is incorrect. If your vehicle has an idle speed constantly dipping below normal, it may indicate a fuel filter change is needed as fuel flow has been restricted. Low Revsįor most vehicles, the idle speed is between 6 RPM. These extra turns will cause an additional drain on the battery, especially during the winter months. Is your car taking a few extra turns to get started? This could be a sign of a clogged filter restricting fuel to the engine. What Are The Symptoms Of A Bad Fuel Filter? Difficult to Start In most cases, the entire unit is replaced but some will have a sealable lid for replacing the filter itself. Most modern fuel filters will be in the form of a changeable metal cartridge containing durable pleated paper for restricting contamination. Some diesel filters will have a drain at the bottom to allow you to discard any water contamination. If a fuel filter is clogged or working ineffectively this can cause several problems. The primary purpose of a fuel filter is to stop contaminants such as debris, dirt or rust from reaching the engine. In this article, we will cover what exactly a fuel filter does and the major symptoms that would indicate a replacement is due. But, that doesn’t mean your fuel filter will last indefinitely, they are eventually prone to wear and clogging. Here in the UK, the standard of fuel is very good with low amounts of contaminants leading to a long life for our fuel filters. ![]() Fortunately, changing your fuel filter may be an inexpensive way of sorting these issues out. Rough idle or difficult to start? Your fuel filter may need replacing. ![]()
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