What are the signs of abnormal fuel supply system in an engine?

[LaNadia]

Engine fuel supply system abnormal signs refer to the red oil can symbol, while the faucet symbol displayed on a car indicates the engine malfunction light. The reasons for its illumination are: 1. Poor engine combustion state; 2. Engine knocking; 3. Poor fuel quality; 4. Dirty engine cylinder interior. Car dashboard indicator lights are categorized as: 1. A yellow triangle with an exclamation mark in the middle refers to the traction control warning light; 2. A yellow bracket with an exclamation mark in the middle refers to the tire pressure monitoring fault indicator; 3. A yellow bulb with an exclamation mark in the middle refers to the lighting fault indicator; 4. A yellow gear with an exclamation mark in the middle refers to the transmission fault indicator; 5. A yellow fan with an exclamation mark in the middle refers to the windshield wiper fault indicator.

[Emery]

The most obvious sign of an abnormal engine fuel supply system is difficulty starting—it takes several turns of the key to ignite, and sometimes it won't start at all. At idle, the car shakes continuously like it's trembling, with even the steering wheel vibrating. When accelerating, the throttle feels sluggish, climbing hills becomes particularly strenuous, and fuel consumption rises sharply. Black smoke from the exhaust pipe or a strong gasoline smell should also raise alarms. If you hear an abnormal buzzing noise near the fuel tank, it's likely a fuel pump issue. I recommend not pushing through—promptly check if the fuel injectors are clogged or if the fuel filter needs replacement. Ignoring these minor issues could lead to a breakdown on the road.

[BrielleMarie]

Once my car suddenly wouldn't start, and it turned out to be an issue with the fuel delivery system. The most obvious sign was the yellow check engine light coming on. Using a diagnostic tool confirmed it was indeed low fuel pressure. Normally, I could feel the throttle response was sluggish, and when overtaking, pressing the accelerator wouldn't increase the RPM much, with the engine sounding muffled. Fuel consumption was also about 20% higher than usual, requiring more frequent trips to the gas station. Cold starts were particularly problematic, often requiring multiple attempts to ignite. Later, the mechanic said it was due to excessive carbon buildup in the fuel injectors causing poor atomization, and cleaning them fixed the issue. It's recommended to use fuel additives regularly to prevent these problems.

[MakaylaLynn]

Abnormalities in the fuel supply system often manifest as unstable idling, with the tachometer needle dancing up and down. When accelerating, there's a noticeable lack of power, especially when going uphill. If you smell gasoline inside the car, it's likely due to a fuel line leak or a fuel tank sealing issue, which requires immediate inspection. Sometimes, you may hear a sharp buzzing sound from the fuel pump during startup, which is not normal. A fuel filter that hasn't been replaced for too long can lead to insufficient fuel pressure, so it's recommended to replace it every 20,000 kilometers. If you encounter these issues, don't attempt to fix them yourself—leave it to the professionals for the safest solution.