Filters 43 www.aftermarketonline.net MAY 2026 Five key signs of a worn fuel filter A blocked or worn fuel filter can restrict fuel flow, whether it’s petrol or diesel, and reduce engine performance in several ways. Comline reveals the issues that can arise. Afuel filter keeps dirt, rust and water out of the fuel system, protecting key parts – like injectors and pumps – while maintaining performance. Over time, it wears out, so acting early based on the warning signs presented can help to avoid engine issues later on. Rough idling or stalling: An inconsistent fuel supply can cause an engine to idle unevenly or stall. This is often one of the earliest signs that the filter is no longer working effectively. Engine hesitation or power loss: If a vehicle struggles to accelerate or feels sluggish under load, restricted fuel flow may be the cause. A clogged filter limits the amount of fuel reaching the engine, reducing performance as a result. Hard starting or failure to start: Difficulty starting the engine – or a complete inability – can indicate poor fuel delivery. In many cases, a heavily blocked filter can be the root cause. Check engine light: Fuel pressure issues caused by a failing filter can trigger the dashboard warning light. While this can point to a range of faults, the fuel filter should not be overlooked during diagnosis. Poor fuel economy: Inefficient fuel supply forces the engine to work harder – often resulting in increased fuel consumption. Over time, this can make a dent in motorists’ wallets due to higher running costs. Don’t compromise on fuel filtration The message from Comline is simple: it is essential to replace a worn fuel filter. It is also imperative to replace it with a part that provides ample protection, stopping contaminants reaching sensitive engine parts. Comline Business Line Manager – Filtration, Toni Spiridon, commented: “Fuel filters play a vital role in engine performance, efficiency and longevity – but can be overlooked. We encourage workshop technicians to keep an eye out for the warning signs and use a quality replacement. This can make a significant difference to both performance and reliability – and keep the customer happy.” tinyurl.com/46t9bfph Keep an eye out for the warning signs and use a quality replacement.
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