What are the consequences of not replacing the fuel filter?

2 Answers
VanMargaret
07/24/25 9:22am
1. The most obvious phenomenon is a decrease in the car's power, unstable idling, and difficulty in starting. 2. It can cause blockage in the fuel line, leading to fuel supply issues. 3. If not replaced for a long time, the filtering effect is greatly reduced, allowing impurities to enter the engine, which reduces the engine's lifespan. 4. Since the fuel filter is connected to the fuel pump, if there are too many impurities in the gasoline, it can clog the fuel injectors, resulting in poor fuel supply. 5. Increased fuel consumption, because the power cannot reach the desired speed, so the driver naturally presses the accelerator harder, which of course increases fuel consumption.
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ODaniel
08/11/25 4:46am
I used to think changing the fuel filter was a waste of money, so I kept putting it off. After driving for a while, the car's acceleration became sluggish, and the engine would shake during starts. Once, it stalled during a long trip, almost causing an accident. When towed to the repair shop, the mechanic said the filter was completely clogged, and debris had entered the fuel injectors, costing nearly two thousand to clean. The consequences of not changing it are severe: poor filtration can damage the fuel pump due to increased pressure; dirty fuel leads to poor combustion and skyrocketing fuel consumption; worst of all, engine oil starvation could cause sudden stalling and accidents. Now, I change it regularly—it saves money and gives peace of mind. At the very least, check it every 20,000 kilometers.
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