How to tell if the fuel filter is dirty?
2 Answers
If you notice increased fuel consumption and unstable idle speed, it's likely that the fuel filter is dirty and needs replacement. Here are some precautions for filter replacement: 1. Before removing the fuel filter, always follow the manufacturer's specified steps to release residual pressure in the fuel system. Otherwise, gasoline may spill, which could pose serious personal safety risks. 2. During the fuel filter replacement process, absolutely avoid smoking or using open flames nearby, as this presents significant safety hazards. 3. Additionally, when replacing the fuel filter, it's advisable to also replace the engine oil, oil filter, and air filter. Filters have inlet/outlet arrow markings - be careful not to install them backwards during replacement.
That day when I took my old buddy out for a drive, I clearly felt the car lacked power when I stepped on the gas, as if it was being dragged along. It was even more noticeable when overtaking on the highway—the engine was panting heavily. At the repair shop, the mechanic checked and found low fuel pressure. When the fuel filter was removed, the gasoline that came out had rust-colored impurities. The mechanic said the filter should have been replaced long ago, as the clogged impurities were making the fuel pump work harder. No matter how careful you are with refueling, you can’t prevent the fuel tank from aging and shedding debris. So now, I proactively replace the filter every 20,000 to 30,000 kilometers—better than waiting for it to cause damage to the fuel pump.
